(CNN) - GOP front-runner John McCain is cruising into Super Tuesday with a hefty lead in the polls, but he's drawing a backlash from some top conservatives who say he is too liberal to carry the Republican nomination.
Radio hosts Rush Limbaugh, Laura Ingraham, Hugh Hewitt and Lars Larson are among the conservative voices speaking out against the Arizona senator.
The attacks have gotten so heated that former Republican presidential nominee Bob Dole Monday wrote Limbaugh defending McCain.
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