Republican Sen. John McCain on Sunday said he was ready to work with US President-elect Barack Obama on economic and national security issues. McCain, who lost the presidential election to Obama, said there will be some areas of disagreement, but that the nation's problems are too big for political divisiveness. The Arizona senator added that people want the government to unite and work together. In a television interview Sunday, McCain also declined to endorse his former running mate, Alaska Gov. Sarah Palin, if she decides to run for president in 2012. In his own words, McCain said, "My corpse is still warm." McCain appeared on ABC television's "This Week."