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US election 2016: Marco Rubio in do-or-die debate US election 2016: Marco Rubio in do-or-die debate
(about 1 hour later)
Presidential hopeful Marco Rubio has his last chance to make an impact in a Republican debate before Tuesday's do-or-die contest in Florida.Presidential hopeful Marco Rubio has his last chance to make an impact in a Republican debate before Tuesday's do-or-die contest in Florida.
He will take to the stage in his home city of Miami a long way behind Donald Trump and Ted Cruz in the race to be his party's nominee. He has taken to the stage in his home city of Miami a long way behind Donald Trump and Ted Cruz in the race to be his party's nominee.
Mr Trump said he expects the debate to be "softer" this time, after personal insults characterised the last one. After criticism of the insult-ridden last debate, Republican leaders wanted a more presidential tone this time.
He picked up a key endorsement of Ben Carson hours before the debate. Mr Trump picked up a key endorsement of Ben Carson hours beforehand.
The retired neurosurgeon dropped out of the race last week and will formally back the New York businessman on Friday, according to the Washington Post and ABC News. The retired neurosurgeon dropped out of the race last week and will formally back the New York businessman on Friday.
After widespread criticism of the last debate, Republican leaders want a more presidential tone this time around.
Republican National Committee Chairman Reince Priebus told CNN he had taken steps to ensure this debate would be "more of a G-rated debate" than others.
Obama: 'Don't blame me for Trump'Obama: 'Don't blame me for Trump'
Who are the Muslims supporting Trump?Who are the Muslims supporting Trump?
Crucial state contests are being held in Florida and Ohio next week, as Mr Trump's rivals try to make up ground. Crucial state contests are being held in Florida and Ohio on Tuesday, as Mr Trump's rivals try to make up ground.
Debate highlights so far:
Ohio Governor John Kasich and Florida Senator Mr Rubio are under pressure to win their home states.Ohio Governor John Kasich and Florida Senator Mr Rubio are under pressure to win their home states.
There are 350 delegates up for grabs on Tuesday, with the winner taking all in Florida.There are 350 delegates up for grabs on Tuesday, with the winner taking all in Florida.
Mr Trump, a billionaire businessman from New York with no political experience in office, has dominated the news, the polls and the state primary contests so far.Mr Trump, a billionaire businessman from New York with no political experience in office, has dominated the news, the polls and the state primary contests so far.
On Wednesday, he added to his list of controversial remarks when he told CNN: "I think Islam hates us, there's a tremendous hatred. We have to get to the bottom of it."On Wednesday, he added to his list of controversial remarks when he told CNN: "I think Islam hates us, there's a tremendous hatred. We have to get to the bottom of it."
There were signs that Mr Trump has been more conciliatory of late.There were signs that Mr Trump has been more conciliatory of late.
After additional state wins on Tuesday night, he said he had "great respect" for House Speaker Paul Ryan.After additional state wins on Tuesday night, he said he had "great respect" for House Speaker Paul Ryan.
He also discouraged booing at the mention of former Republican presidential candidate Mitt Romney's name and urged the Republican party to "unify" behind him.He also discouraged booing at the mention of former Republican presidential candidate Mitt Romney's name and urged the Republican party to "unify" behind him.
The next votesThe next votes
15 March: Florida, Illinois, Missouri, North Carolina, Ohio Primaries15 March: Florida, Illinois, Missouri, North Carolina, Ohio Primaries
22 March: Arizona Primary, Utah Caucuses, Idaho Caucuses (Democratic)22 March: Arizona Primary, Utah Caucuses, Idaho Caucuses (Democratic)
26 March: Alaska, Hawaii, Washington Caucuses (Democratic)26 March: Alaska, Hawaii, Washington Caucuses (Democratic)
1 April: North Dakota Caucuses (Republican)1 April: North Dakota Caucuses (Republican)
5 April: Wisconsin Primary5 April: Wisconsin Primary
9 April: Wyoming Caucuses (Democratic)9 April: Wyoming Caucuses (Democratic)
19 April: New York Primary19 April: New York Primary
On the Democratic side, Vermont Senator Bernie Sanders and former Secretary of State Hillary Clinton are battling for the party's nomination.On the Democratic side, Vermont Senator Bernie Sanders and former Secretary of State Hillary Clinton are battling for the party's nomination.
Mrs Clinton is leading Mr Sanders in delegate counts so far, though his campaign has proved more formidable than expected.Mrs Clinton is leading Mr Sanders in delegate counts so far, though his campaign has proved more formidable than expected.
Both parties will determine their nominees at conventions in July, then Americans will pick their new president in November.Both parties will determine their nominees at conventions in July, then Americans will pick their new president in November.