Rosie O'Donnell reacts to Trump's tweet at her: 'It’s a clear indication of his seriously declining mental health'

'This is no joke'

O'Donnell says that Trump trolling her on Twitter is 'no joke' (Dia Dipasupil/Getty Images for GLAAD)

Rosie O’Donnell says that President Donald Trump’s use of Twitter to troll her on her past statements about firing former FBI Director James Comey is a sign of mental instability.

"It’s a clear indication of his seriously declining mental health,” Ms O’Donnell wrote in a text message that MSNBC host Nicole Wallace read on air. “This is no joke.”

Ms O’Donnell was replying to a tweet Mr Trump had directed at her shortly beforehand. In it, he took a tweet she had written in November that called for the dismissal of Mr Comey and quoted it, saying, “We finally agree on something Rosie.”

Mr Trump’s jibe at Ms O'Donnell — the latest in a longstanding feud between the two — came just days after he suddenly fired Mr Comey from his position at the top of the FBI for similar reasons to those that convinced Ms O’Donnell to suggest his ouster. In their justification for firing Mr Comey, Mr Trump's team cited a memo written by the Justice Department that indicated Mr Comey’s handling of Hillary Clinton's emails was inappropriate. However, Mr Trump has since contradicted this line, and said he would have fired Mr Comey "regardless" of any recommendation.

Mr Comey’s decision to send a letter to Congress just weeks before the 2016 election has been credited as an important and decisive moment that may have tilted the electorate in Mr Trump’s favour. Ms O’Donnell, a supporter of Ms Clinton, had originally tweeted that Mr Comey should be fired for those actions.