U.S. Senator from Florida and potential vice presidential candidate Marco Rubio has indefinitely postponed his appearance tonight at the Constitution Center. The event, hosted by WPHT’s Dom Giordano, was titled “The Voice of New Conservativism.” According to the Constitution Center, Rubio was “called to Washington D.C. to take part in unexpected votes in the Senate.”

Except which votes that would be is unclear. What is clear is that earlier today, it was reported—after some reporting to the contrary—that Rubio is currently being vetted as a potential vice presidential candidate. And that’s according to presidential candidate Mitt Romney, himself.

Asked in Michigan whether a report on Rubio not being vetted was true, Romney said: “The story was entirely false…Marco Rubio is being thoroughly vetted as part of our process,” according to USA Today.

Rubio, a supposed Tea Party favorite, is one of several swing state politicians that’ve been rumored as potential VP candidates. He recently gave a speech to the Faith and Freedom Conference regarding President Obama’s demolition of both, and is seen as a candidate who could perhaps help Romney with both Hispanic voters (Rubio is Cuban-American) and Florida. Rubio made an odd mistake last week when he did not rip Obama’s plan to stop deporting illegal immigrants who are in the United States by no fault of their own. He later made due and called Obama’s plan an “election year stunt” during a Monday appearance on Fox & Friends. Similarly, Romney has not taken a stand on this issue and cut a press call off abruptly this morning after being asked about immigration.