Priebus said he was "suprised," but that Romney's consideration of a 2016 campaign is "for real."
The second-place finisher in the last presidential race railed against the frontrunner in the next.
Mitt Romney and Chris Christie raise seven figures for RGA from Boston donors.
Some still angry about 2012 and others concerned by scandals, Romney donors unsure if they'll cut checks for Christie in 2016
No hard feelings, said the 2012 Republican White House nominee.
The film is titled "Mitt."
Idaho has a large Mormon population -- Simpson and Romney are both Mormon -- and Romney easily won its GOP caucuses
Mitt Romney is building a new house in Utah, returning to the state where he helped lead the 2002 Salt Lake City Olympics.
Mitt Romney, who has kept a low profile since failing in his quest for the White House, plans to resurface next week to ham it up with Jay Leno.