(CNN) - Former Republican presidential hopeful Mitt Romney announced Thursday that he is backing Sen. John McCain in his bid for the Oval Office.
"I am honored today to give my full support to Sen. McCain," Romney said in a joint news conference with Sen. McCain by his side.
"This is a man capable of leading our country in this dangerous hour."
Romney said he had no doubt McCain should be the next president of the United States.
After his announcement, Romney introduced McCain as a true American hero.
CNN learned the negotiations that led to the Romney endorsement included a prominent role by John Weaver, who was McCain's top political strategist until he was forced out in a campaign shakeup last summer.
Programming note: Watch Larry King’s exclusive interview with GOP front-runner John McCain tonight on Larry King Live at 9 P.M. Eastern.