Source: MSNBC

None of the three remaining Republican presidential candidates would guarantee yesterday that they would support the eventual GOP nominee for president.

The arm grab that supposedly never happened just landed Donald Trump campaign manager Corey Lewandowski under arrest.

Bernie Sanders is preparing to ratchet up his attacks on Hillary Clinton ahead of a New York showdown.

Donald Trump swept to victory in yesterday's primaries but rival Ted Cruz showed some fight with a win in Utah that gave hope to establishment Republicans.

Ricahrd McLachlan asks, how would the foreign policy positions of Hillary and Bernie best address global jihad? Trump and Cruz have already made themselves clear.

Terror attacks continue in the West. Jennifer Rubin, who writes the Right Turn blog for the Washington Post, asks if it could get worse.

"It's a big, dumb thing that only gets more expensive over time," Oliver said. "It's like getting a pet walrus. You think it's stupid now - wait until you learn what a bucket of sea cucumbers costs. You've not prepared for that."

Donald Trump has warned of riots if he is denied the party's presidential nomination and pulled the plug on a scheduled debate among candidates.

COMMENT: With presidential race and border crossings turned into lucrative TV, issues of office solve themselves, writes Jerry Flay.

COMMENT: Before Donald Trump revealed himself to his ecstatic believers at the Tampa Convention Centre in Florida on Tuesday, his terrible retinue stormed the stage.

Where to now for Marco Rubio and the Republican Party?

Donald Trump's controversial run to become the Republican presidential candidate received another boost with Marco Rubio calling it quits.

The presidential primary season barrelled towards a potentially decisive day that could transform Trump and Clinton from frontrunners to likely nominees.

COMMENT: Trump has turned the entire political world upside down, he's turned it into a sideshow of stylised violence, writes John Dybvig.

COMMENT: The Left and Right are agreed that Trump would demean the world's most prestigious political office.

Remaining four GOP candidates put to the test in high-stakes Florida debate.

Moral dilemmas often pit narrow self-interest against the greater good, writes Paul Thomas.

Democratic presidential hopefuls Hillary Clinton and Bernie Sanders sparred over who was more committed to immigration reform at a presidential debate.

You want to be mayor? Get a wall.

A retired three-star general has spoken out that the armed forces would not be Trump's "palace guards" if he became president.

Could an old bet about Donald Trump prove lucrative for Polly Gillespie?

No precedent exists for the success so far of Donald Trump, who has been neither a state governor nor a member of Congress.

Donald Trump is responding to Mitt Romney's evisceration of him by noting that that the 2012 GOP presidential nominee begged for Trump's endorsement.