I never saw major talk radio support, I saw them start to lean his way when there where just a couple of RINOs left, ie best of the bunch.. but nothing like all out support.
Talk radio didn’t have to come out and endorse him outright to support him. They spent their time attacking his opponents. Rush said that Romney was only wrong on one conservative issue in the past.
Either Jim Robinson is a liar or Rush Limbaugh is.