Super Tuesday, the busiest day in the primary campaign, has handed big wins to Democrat Hillary Clinton and Republican Donald Trump.
Of the 11 states that held primaries, both presidential candidates won seven each.
Mrs Clinton found support in black voters in the southern states, as well as female and older voters. Her rival, Bernie Sanders, was victorious in four states.
Mr Trump’s success left Ted Cruz with wins in two states and Marco Rubio, a win in one.
Who were the winners?
Georgia - Democrat: Hillary Clinton, Republican: Donald Trump
Vermont - Democrat: Bernie Sanders, Republican: Trump
Virginia - Democrat: Clinton, Republican: Trump
Alabama - Democrat: Clinton, Republican: Trump
Massachusetts - Democrat: Clinton, Republican: Trump
Oklahoma - Democrat: Sanders, Republican: Trump
Tennessee - Democrat: Clinton, Republican: Trump
Arkansas - Democrat: Clinton, Republican: Trump
Texas - Democrat: Clinton, Republican: Ted Cruz
Minnesota (caucus) - Democrat: Sanders, Republican: Marco Rubio
Alaska (caucus) - Republican: Ted Cruz
Colorado (caucus) - Democrat: Sanders
American Samoa (caucus) - Democrat: Clinton
What is the delegate count now?
Super Tuesday allocates nearly a quarter of the Republican delegates and around a fifth of Democratic delegates.
To become the Democratic presidential candidate, 2,383 delegates are needed. With Mrs Clinton winning the larger states on Super Tuesday, she bagged herself a larger share of the delegates with 457. Mr Sanders won 373.
Republicans need 1,237 delegates to win the party’s nomination. On Super Tuesday, Mr Trump won 203 and Mr Cruz 144.
Trump – 315
Cruz – 205
Rubio – 106
Clinton – 1,055
Sanders – 418
O’Malley - 0
Delegates for each party elect their presidential candidate at party conventions in June.
What do the Super Tuesday results mean for the election?
Mrs Clinton and Mr Trump have made huge strides forward in their respective campaigns, increasing the chance of a battle between the two of them in the November election.
Addressing supporters at a victory rally in Miami, Mrs Clinton said: “It’s clear tonight that the stakes in this election have never been higher and the rhetoric we’re hearing on the other side has never been lower.”
Mr Trump, whose rhetoric and policies have been called divisive by other Republican presidential candidates, said: “Once we get all this finished, I’m going after one person – Hillary Clinton.”
What happens next?
Throughout March, there will be a slew of primaries:
5 March – Kansas, Kentucky, Louisiana, Maine
6 March – Puerto Rico
8 March – Hawaii, Idaho, Michigan, Mississippi
10 March – US Virgin Islands
12 March – District of Columbia, Guam, Wyoming
15 March - Florida, Illinois, Missouri, North Carolina, Northern Mariana Islands, Ohio
22 March – American Samoa, Arizona, Utah
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