Cincinnati (CNN) - In another sign the GOP establishment is coalescing behind Mitt Romney, former first lady Barbara Bush recorded a robo call for the Republican contender's campaign.
The robo call featuring a brief message from Mrs. Bush began ringing households Saturday in the critical Super Tuesday state of Ohio.
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"We have known the Romneys for years and believe Mitt is the best man to lead the country for the next four years and Ann will make a great first lady," Mrs. Bush, who says on the call.
The robo call is also being used in Vermont, another state that votes Tuesday.
Former President George H.W. Bush announced his support for Romney in December.
The couple's sons, former president George W. Bush and ex-Florida governor Jeb Bush, have yet to endorse a candidate.