President, first family end 1 1/2 day visit to Florida Keys.
Romney has been adamant in saying he will not run for president a third time, and aides insist reunion is not a 2016 strategy session.
The Texas senator talks about where he differs with fellow tea party favorite Rand Paul.
The meeting came as the United States tries to rally support behind Ukraine's government amid the growing conflict there.
The former defense secretary predicts Ukraine won't be able to hold on to the region.
The deputy national security adviser made the Sunday show rounds to talk about the situation in Ukraine.
Tony Blinken provides an update on the U.S. reponse
The senator from Kentucky keeps his options open.
Spiker will become an adviser to the PAC of Sen. Rand Paul (R-Ky.).
One of the president's closest aides and confidants is leaving the White House in May.