Possible running mates hit the trail for traveling Mitt Romney as campaign keeps mum on pick

While Mitt Romney began the international portion of his presidential audition Thursday, vice presidential tryouts continued at home, with several potential running mates campaigning for Romney in battleground states.

Virginia Governor Bob McDonnell attended a town hall event in Davenport, Iowa Thursday morning. Louisiana Governor Bobby Jindal was scheduled to attend a similar event in the evening in West Des Moines, after the two governors appeared together in Coralville, Iowa.

South Dakota Senator John Thune campaigned for the presumptive Republican nominee in Virginia Beach, Va., and Florida Senator Marco Rubio will attend a Romney rally in Las Vegas on Saturday.

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Romney met Thursday with British Prime Minister David Cameron and other British officials in London, where he will attend the opening ceremony of the Olympic Games on Friday.

The Romney campaign has revealed few details of its vice presidential search. In an interview Wednesday with “NBC Nightly News” anchor Brian Williams, Romney said “I can’t give you anything on that front whatsoever.”

“I can tell you I’m not going to announce it this week,” Romney added. “While I’m overseas, I’m not going to announce my vice presidential running mate. But when the decision is made, I’ll make that announcement. It’s not made yet. But I can’t tell you when it’s going be. That’s something which we’ll decide down the road.”

On Tuesday at a small rally of Republican women in Virginia, Romney adviser Beth Myers—the aide leading the search—said the her job has been “really, really hard” because the GOP has a “deep bench,” and she acknowledged the difficulty of keeping the process under wraps.

“It’s been very strange,” Myers said, according to ABC News. “I can’t tell — because I’m a pretty open person — but I can’t tell anybody about this at all. My children and husband are really kind of upset. ... I can sort of tell they’re plotting against me, and they’ll have, like — dinner table — just a casual conversation: ‘Gee, who would be a good VP?’ And I just sit there silently.”