(CNN) – As Mitt Romney tours London on the first stop of his overseas trip, prominent surrogates for the presumptive GOP nominee are making their choices for his running mate known stateside.
House Speaker John Boehner said Thursday he was rooting for Sen. Rob Portman, who, like Boehner, represents Ohio.
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“I’m partial to Rob Portman,” Boehner said on Fox News. “I’ve been a long-time friend. He’s a United States senator from Ohio, served as the director of Office of Management and Budget under George W. Bush, also served as the U.S. trade rep, served in the House of Representatives as well. Knows his way around Washington, and I think he’d be a great asset for Governor Romney.”
Boehner seems to have narrowed his list since April, when he told CNN Chief Political Correspondent Candy Crowley there were three names he had in mind for Romney’s running mate.
The top Republican in Congress said Sen. Marco Rubio of Florida and Gov. Mitch Daniels of Indiana, along with Portman, fit his criteria that the pick be capable of serving as president.
"There are a lot of people that I like. But this is a personal choice for Gov. Romney, and I'm confident that he'll have a running mate that will be helpful to the ticket," Boehner told Crowley on CNN’s “State of the Union.”
"I think the number one quality is, are they capable of being president in the case of an emergency?" Boehner added.
Former New York City Mayor Rudy Giuliani offered a different name Thursday, saying he’d like to see Rubio picked. Giuliani said the Florida senator was “the most exciting” name floated for Romney’s running mate.
"He's of a different generation," Giuliani told News Channel 8 in Tampa. "He makes outreach much more possible to a younger people – people in their 30s where the Republican Party has a little bit of a deficit."
Meanwhile, several names floated as Romney’s choice have been stumping for the candidate while he embarks on a three-nation foreign tour.
Gov. Bobby Jindal of Louisiana and Gov. Bob McDonnell of Virginia made several stops in Iowa Thursday. The two potential vice presidential choices teamed for an event in Coralville. McDonnell also stopped in Davenport, while Jindal held an event in Des Moines.
Sen. John Thune, R-South Dakota, also considered a possible Romney running mate, made an appearance for the campaign in Virginia Beach, Virginia.
CNN’s Steve Brusk contributed to this report.
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