Donald Trump on Sunday repeatedly slammed his chief presidential rival Sen. Ted Cruz as a "total liar" as the Texas senator and his allies have claimed in the final stretch to the Iowa caucuses that Trump favors government-run, universal health care. Cruz, meanwhile, pressed forward Sunday with the line of attack, proclaiming: "A vote for Donald Trump is a vote for Obamacare." "Look, Ted Cruz is a total liar. I am so against Obamacare. I've been saying it for two years in my speeches, I'm going to repeal and replace Obamacare," Trump said on ABC's "This Week." "I don't even...