Mitt Romney told reporters here Tuesday that his vice presidential search team is vetting Sen. Marco Rubio, R-Fla., one of the Republican Party's biggest young stars, to be his running mate.
"Marco Rubio is being thoroughly vetted as part of our process," Romney told reporters, according to a pool report, after gathering a press pool for an unannounced campaign stop Tuesday afternoon in Michigan.
Romney's comments come on a day when ABC News first reported that his search team had not asked Rubio to complete a questionnaire or submit any personal financial documents. One outside Romney adviser confirmed the report to the Washington Post later Tuesday, but the adviser left open the possibility that Romney officials could decide to thoroughly vet Rubio at a later date.
Another adviser who works directly on the campaign told the Post earlier Tuesday that Romney officials conducted a preliminary review of Rubio, mostly using documents, statements and news reports that are publicly available.
Other vice presidential possibilities, including Sen. Rob Portman of Ohio and former Minnesota Gov. Tim Pawlenty, are undergoing a more intensive review, according to two Republicans close to the campaign.
Although many of the party's grass-roots conservative activists favor Rubio -- he routinely wins vice presidential straw polls -- Romney has long said that his top priority in selecting a running mate is finding a partner with the experience and wisdom to step in as president on Day One.
Rubio, 41, was elected to the Senate in 2010 after serving as speaker of the Florida House of Representatives.