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Donald Trump has broken his silence on Hillary Clinton's pneumonia, appearing on Fox News to wish his rival well.
"The coughing fit was a week ago so I assume that was pneumonia also," he said. "Something's going on.
"I just hope she gets well and gets back on the trail and we'll be seeing her at the debate."
Asked whether the health of the candidates was an issue, Mr Trump said: “I think it's an issue. In fact ... this last week I took a physical and I'll be releasing... when the numbers come in... hopefully they're going to be good.... I feel great... I'll be releasing very, very specific numbers.”
Ms Clinton's doctor confirmed she was being treated for pneumonia hours after she stumbled and felt unwell at a 9/11 memorial service on Sunday.
She had been due to fly to San Francisco and Los Angeles on Monday, but a campaign official said she had cancelled the two-day California trip that was to include a key speech on the economy and fundraising events.
Ms Clinton was capturd on video struggling to stay on her feet as her knees buckled at the event. She had to be helped by Secret Service personell as she got into a vehicle to leave early.
Show all 30 1 /30In pictures: Hillary Clinton's 2016 presidential bid In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 11/09/2016: Hillary Clinton waves to the press as she leaves her daughter's apartment building after resting in New York. Clinton departed from a remembrance ceremony on the 15th anniversary of the 9/11 attacks after feeling "overheated," but was later doing "much better," her campaign said
AFP/Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 25/08/2016: Hillary Clinton speaks at a campaign event in Reno, Nevada
AFP
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 27/07/2016: US President Barack Obama and Democratic presidential nominee Hillary Clinton embrace on stage during Day 3 of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania
AFP/Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 11/07/2016: Bernie Sanders officially endorsed Hillary Clinton, saying his progressive vision for ‘a transformed America’ would be ’best served by the defeat of Donald Trump’
Reuters
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 26/06/2016: New York Governor Andrew Cuomo, former Secretary of State and Democratic Presidential candidate Hillary Clinton, Al Sharpton and New York mayor Bill de Blasio march during the New York City Pride March in New York City
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 7/06/2016: Democratic presidential candidate Hillary Clinton gestures as she greets supporters at a presidential primary election night rally in New York
AP
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 26/05/2016: A supporter of democratic presidential candidate former Secretary of State Hillary Clinton holds up a shirt during a campaign event in San Francisco, California
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 26/04/2016: Hillary Clinton embraces her husband, former President Bill Clinton, at a primary night campaign event in Philadelphia, Pennsylvania. Early results indicated Clinton would win Pennsylvania's presidential primary
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 8/03/2016: Hillary Clinton and Bernie Sanders during of the CNN Democratic Presidential candidates' debate, at the Whiting Auditorium in Flint, Michigan
EPA
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 3/03/2016: Singer Katy Perry raises arms with U.S. Democratic presidential candidate Hillary Clinton at the end of the Hillary Victory Fund "I'm With Her" benefit concert at Radio City Music Hall in the Manhattan borough of New York City
REUTERS
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 28/02/2016: Hillary Clinton delivered a victory speech in Columbia
AP
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 16/02/2016: Hillary Clinton speaks at a rally at Truckee Meadows Community College in Reno, Nevada
AP
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 9/02/2016 (L-R) Priyadharshini Shanthakumar, Hattie Hughes and Claudia Blair with Hillary Clinton campaigning in Derry, New Hampshire
Hattie Hughes
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 30/01/2016: Hillary Clinton is introduced by her daughter Chelsea while the two campaigned together at a 'Get Out The Vote" caucus' event at the Carrollton Inn in Carroll, Iowa
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 14/12/2015: Hillary Clinton speaks during the National Immigrant Integration Conference in New York City. During the speech Clinton announced her immigration proposals if elected president
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 9/11/2015: Hillary Clinton speaks on stage during a rally after filing paperwork for the New Hampshire primary at the State House in Concord, New Hampshire. Each candidate must file paperwork to be on the New Hampshire primary ballot, which will be held on 9 February 2016
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 22/10/2015: Hillary Clinton avoided major damage to her presidential campaign during a nearly 11-hour congressional hearing dominated by Republican criticism of her response to the Benghazi attacks
AFP
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 9/09/2015: Hillary Clinton takes part in a discussion after speaking about the Iran nuclear deal at the Brookings Institution in Washington. Clinton expressed firm support for the nuclear accord with Iran, calling it flawed but still strong. Clinton added that the agreement must be strictly enforced and said that if elected president next year, she would not hesitate to use military force if Iran fails to live up to its word and tries to develop a bomb
AFP/Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 8/09/2015: Hillary Clinton does the "Nae Nae" dance move with DJ Stephen "Twitch" Boss (L) and television host Ellen DeGeneres (R) during a taping of "The Ellen DeGeneres show" in New York
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 26/08/2015: Hillary Clinton greets guests during a campaign event at Tabor Home Vineyards and Winery in Baldwin, Iowa. A recent poll has Clinton leading all other Democratic contenders in Iowa by about 30 percentage points
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 13/07/2015: Hillary Clinton poses for a selfie with a student outside the New School after speaking to outline economic vision in New York. Clinton promised to raise incomes of hardworking Americans and rein in excesses on Wall Street in the first major economic policy address of her 2016 campaign
AFP/Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 15/06/2015: Hillary Clinton speaks during a forum on early childhood education at the YMCA of Strafford County in Rochester, New Hampshire. Clinton held a formal launch event in New York City, and is hitting the first in the nation primary state for the third time since announcing her candidacy in April
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 22/05/2015: Hillary Clinton tours the Smuttynose Brewery in Hampton, New Hampshire
Getty Images
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 23/04/15: Hillary Clinton addresses the Women in the World Conference in New York City
Getty
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 22/04/15: Hillary Clinton waves to college students as she leaves after speaking during the Hillary Rodham Clinton Award for Advancing Women in Peace and Security at Georgetown University in Washington
AFP/Getty
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 21/04/15: Hillary Clinton meets with audience members after speaking with students and faculty of New Hampshire Technical Institute in Concord, New Hampshire. The conversation revolved around higher education, manufacturing and women in the work force
Getty
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 13/04/15: “Loaded the van & set off for IA. Met a great family when we stopped this afternoon. Many more to come.” A picture of one family Hillary Clinton met on her road trip, which she tweeted
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 12/04/15: The building that will house Hillary Clinton's campaign headquarters, on the corner of Pierrepont and Clinton Streets in historic Brooklyn Heights, NY
Corbis
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 12/04/15: Some expect Hillary Clinton’s campaign to cost more than Barack Obama’s $1bn in 2012
EPA
In pictures: Hillary Clinton's 2016 presidential bid Clinton campaign 12/04/15: Hillary Clinton formally declares in a video that she will seek the Democratic Party’s presidential nomination for 2016, and says she wants to bring the benefits of the economic recovery to all Americans
AP
The diagnosis was not revealed until the video went viral and raises fresh uncertainty about her health as the campaign reaches its final, most intense phase.
Mr Trump has repeatedly fanned conspiracy theories about Ms Clinton's health and questioned whether she has the stamina needed to be commander in chief.
On Sunday he remained uncharacteristically quiet about his rival's latest woes. His surrogates have reportedly been told not to speculate about Ms Clinton's health on social media for fear it may rebound on Mr Trump.
On Monday morning he even struck a maganimous tone during the telephone interview on Fox and Friends .
The Republican candidate also used the segment to condemn Ms Clinton for describing half his supporters as a "basket of deplorables."
He said that when he heard the comment, he "thought that it was not something that was within the realm of possible that she would have said it".
The Republican presidential nominee said that being elected to the White House means: “You're president of all the people.”
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