Several major Republicans got behind Romney this weekend, with another expected to endorse today. House Majority Leader Eric Cantor and Sen. Tom Coburn both came out in favor of Romney on Sunday, saying he was best equipped to challenge President Obama. John Ashcroft is expected to endorse Romney today. Even Barbara Bush is making robocalls on his behalf. With Romney now running even against Rick Santorum in Ohio, the Republican leadership has good reason for wanting to wrap up the race with Super Tuesday. A Wall Street Journal/NBC News poll shows that 40 percent of adults say the primary has made them feel less favorable toward the Republican Party. Even Romney, despite leading the field, has high negatives: 28 percent of voters have a favorable impression of him, while 39 percent have an unfavorable one.