Scott Walker

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Red meat: Wisconsin Gov. Scott Walker told his CPAC audience that he is a grass-roots favorite. He and other Republicans (at top from left), Ben S. Carson, New Jersey Gov. Chris Christie and Sen. Ted Cruz of Texas, made their cases for conservatism. (Photographs by Rod Lamkey Jr./Special to The Washington Times)

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Wisconsin Gov. Scott Walker gestures while speaking during the Conservative Political Action Conference (CPAC) in National Harbor, Md., Thursday, Feb. 26, 2015. (AP Photo/Cliff Owen)

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Wisconsin Gov. Scott Walker will be among a crowd of potential Republican presidential candidates to speak at the Conservative Political Action Conference. (Associated Press)

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Scott Walker has inherited the "Romney vote," says one pollster. (Associated Press)

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Wisconsin Gov. Scott Walker delivers his speech at Chatham House in central London, Wednesday, Feb. 11, 2015. Walker is leading a coalition of Wisconsin government and business officials on a trade mission in the UK that runs until Friday, Feb. 13, 2015. The trip gives him a chance to bolster his overseas and foreign policy credentials as he considers running for US President in 2016. (AP Photo/Lefteris Pitarakis)

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Wisconsin Gov. Scott Walker delivers his speech at Chatham House in central London, Wednesday, Feb. 11, 2015. Walker is leading a coalition of Wisconsin government and business officials on a trade mission in the UK that runs until Friday, Feb. 13, 2015. The trip gives him a chance to bolster his overseas and foreign policy credentials as he considers running for US President in 2016. (AP Photo/Lefteris Pitarakis)

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Wisconsin Gov. Scott Walker leaves after a meeting with Britain's Chancellor of the Exchequer George Osborne at No 11 Downing Street, the Chancellor's official residence, in London, England, Wednesday, Feb. 11, 2015. Walker is leading a coalition of Wisconsin government and business officials on a trade mission that runs until Friday. (AP Photo/Tim Ireland)

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Wisconsin Gov. Scott Walker leaves 10 Downing St. after a private meeting with British Prime Minister David Cameron in London, England, Tuesday, Feb. 10, 2015. (AP Photo/Tim Ireland)

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Gov. Scott Walker

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Republican Wisconsin Gov. Scott Walker to be best positioned to take advantage of the wide-open field following Mitt Romney's decision not to run for president, after a Des Moines Register poll showed him leading the pack among possible candidates at 15 percent. (Associated Press)

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Wisconsin Gov. Scott Walker, wife Tonette and their two sons, Matt and Alex, are all Harley Davidson fans. (Office of Gov. Scott Walker)

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Scott Walker, who has won two election battles in the swing state of Wisconsin since taking on public unions, did plenty at the Iowa Freedom Summit to dispel perceptions he was an understated speaker lacking in charisma. (Associated Press)

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Former Hewlett-Packard chief executive Carly Fiorina and Wisconsin Gov. Scott Walker were seen as doing the best of improve their position among voters at the Freedom Summit in Des Moines, Iowa. Saturday.

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Wisconsin Gov. Scott Walker gestures after speaking at the Freedom Summit, Saturday, Jan. 24, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)

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Wisconsin Gov. Scott Walker speaks during the Freedom Summit, Saturday, Jan. 24, 2015, in Des Moines, Iowa. (AP Photo/Charlie Neibergall)

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Wisconsin Republican Governor Scott Walker is one of 23 potential GOP presidential hopefuls heading to the Iowa Freedom Summit in Des Moines on Saturday to test their messages. (Associated Press)

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Wisconsin Gov. Scott Walker shakes hands with Rep. Scott Allen, right, R-Waukesha, before the Governor's State of the State address to a joint session of the Legislature in the Assembly chambers at the state Capitol Tuesday, Jan. 13, 2015, in Madison, Wis. (AP Photo/Andy Manis)