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Gov. Scott Walker is preparing to run for president in 2016 by hiring an experienced GOP operative and giving him the green light to build a foundation for a White House bid.

The Wisconsin Republican was re-elected to a second term this past November and has pledged to focus on his job as governor through the first half of 2015.

But he said in an interview this week that any “serious” candidate for the Republican presidential nomination has to join the race by the middle of this year. Although Walker stopped short of declaring his candidacy, he sounded like a politician who has decided to run.