5 people Donald Trump could pick to be his vice president

Republican presidential candidate Donald Trump thought Seth Meyers delivery was not good. Photo / AP

Donald Trump's victories in a series of Northeastern and Mid-Atlantic states over the past two weeks have made one thing clear: He is the clear favourite for the Republican presidential nomination.

Who is he going to pick as his vice-presidential nominee?

The short answer: No one knows. Trump relishes being unpredictable so trying to game out how this most unconventional of politicians will make his mind up is a bit of a guessing game. Add to that the fact that Trump's inner circle remains, largely, devoid of establishment types and you quickly get into a situation where the people talking don't know much and the people who do know aren't talking.

Trump himself has been open about the lack of thought he has put into the process. "I just don't want to think about it right now," he said of the veepstakes following his five-state sweep on Tuesday night.

That's never stopped me before though - and it won't stop me now! Below the five people most likely to wind up as Trump's second-in-command. Caveat: These rankings can and will change.

5. Marco Rubio: Yes, there was that whole "Little Marco" thing. But if Ben Carson can make peace with Trump, then anything can happen. Rubio is clearly in search of a next step in his political career, and while most insiders raise questions about whether he would accept the vice-presidential nomination, it's still hard for me to imagine anyone turning it down. Rubio could help Trump with outreach to establishment Republicans and in Florida. As a Cuban-American, he also might be able to blunt some of Trump's sharpest edges on immigration and avoid an electoral disaster in the Hispanic community.

4. John Kasich: In general, these two have been on (relatively) friendly terms throughout the race. Kasich would represent an olive branch - of sorts - from Trump to the establishment and might carry the sort of resume (member of Congress, Midwestern governor) that would appeal to Trump. And Kasich, who is in the middle of his second term, might find the chance at a vice-presidential nomination - even if it meant sharing a ticket with Trump - impossible to resist.

3. Joni Ernst: The Iowa Republican senator emerged as a breakout star of the 2014 midterm election with her plain-spoken populism. Ernst, like many Republican female politicians, has been critical of Trump's comments about women, which could either appeal to him or disqualify Ernst entirely. If Trump wanted to make a turning-over-a-new-leaf pick, Ernst would make a ton of sense. If Trump believes "being Trump" is the essence of his appeal, he might look askance at anyone who has crossed him. Ernst has proven she is a gifted communicator and someone who might help Trump sell to the Midwestern voter he badly needs if he wants to be competitive with Clinton.

2. Rick Scott: The Florida governor wrote a Facebook post on Wednesday urging the party to rally behind Trump. "The Republican leaders in Washington did not choose him, but the Republican voters across America did choose him," Scott wrote. "The voters have spoken." Scott has been consistently supportive of Trump for months now and endorsed him as soon as the real estate billionaire won the Sunshine State in early March. Scott's profile is also likely appealing to Trump - a wealthy businessman who ran and beat the Republican establishment to get elected governor. Plus, he's from a big swing state.

1. Chris Christie: "I think Chris Christie is fantastic," Trump said on Tuesday night as the New Jersey governor (and his wife) stood just behind him on stage. No one has risked more with his support for Trump than Christie, who has been roundly mocked and dismissed by the GOP establishment for the decision. Personality-wise, Christie and Trump seem to be an obvious match. And, Trump has said before that he would want a politician as his running mate. From a geographic/ideological standpoint, Christie doesn't add a ton to the Trump ticket. But who knows if Trump even cares?