From the New York Times:
During the federal government shutdown, Senator Marco Rubio of Florida has appeared guided by one goal: sticking as close as possible to Senator Ted Cruz of Texas.
Eager to regain favor with conservatives as he considers running for president, Mr. Rubio has fully embraced Mr. Cruz’s effort to block financing for the new health care law, standing with him at news conferences and through procedural maneuvers to that led to the shutdown.
Even more tellingly, on the evening of Sept. 24, Mr. Rubio made sure to join Mr. Cruz for his marathon speech against the health care law and was late to a previous commitment: an elegant Capitol Hill fund-raiser for Gov. Terry E. Branstad of Iowa, attended by Republican establishment figures like the lobbyist Ron Kaufman, former Gov. Haley Barbour of Mississippi and the former White House counsel C. Boyden Gray.
“I want to thank the senator for his efforts here today, and in the weeks that have led us here,” Mr. Rubio said as Mr. Cruz gladly yielded the floor. At 6 the next morning, Mr. Rubio returned to the Senate floor and rejoined Mr. Cruz.