Gov. Walker

Wisconsin Gov. Scott Walker will announce his long-expected campaign for president on Monday in Waukesha.

The Republican begins as the favorite in early primary state Iowa, a post he's kept since his rousing speech there in January. He benefits from being the neighboring governor and will look now to carve a path that goes beyond the Hawkeye State. He has vaulted into the top tier of GOP White House hopefuls and is a lock to make the debate stage next month.

Gov. Walker
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Former Florida Gov. Jeb Bush officially announced his bid for president Monday. This means Gov. Walker would be one of the last to enter the race. Walker has said he won’t announce until he signs the state budget.

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Updated at 1:45 p.m. ET

Republican Scott Walker dismissed any controversy over a law he signed in Wisconsin requiring women seeking abortions to get an ultrasound, referring to ultrasounds in an interview on a conservative radio show as "just a cool thing out there."

The list of official and likely candidates for president in 2016 includes some prominent Republicans who are currently governors. Three of them — Scott Walker, Chris Christie and Bobby Jindal — all tout executive experience as qualification for the White House. They also share something else — slumping poll numbers back home.

They've been working to make themselves familiar and friendly faces to the party faithful in early voting states, including at a big event hosted last week by the New Hampshire GOP.

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As the debate over Governor Walker’s proposed budget continues in the Wisconsin legislature, the statewide story is getting an unprecedented amount of national coverage.

Meanwhile, Scott Walker’s probable presidential bid has led many local media outlets to turn reporters normally on a Wisconsin-specific beat into national political reporters.

For Republicans running for president — or eyeing it — this weekend was a big opportunity.

GOP presidential hopefuls from Marco Rubio to Ted Cruz to Carly Fiorina to Donald Trump descended on New Hampshire this weekend. The 19 candidates, and potential candidates, gathered in Nashua, N.H., for an event sponsored by the state Republican Party. They wooed activists and jockeyed for early position in the state that holds the first presidential primary.

Gov. Walker
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Gov. Scott Walker has enjoyed decent job performance ratings since the Marquette Law School poll began in 2012. But, it was all bad news for him in the latest poll.

His approval ratings, in the first survey of 2015, have plummeted. The latest numbers also indicate strong opposition to key provisions of the governor’s budget.

Director of the Marquette Law School Poll Charles Franklin calls the drop in Gov. Walker’s approval rating breathtaking.

Gov. Walker
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Former Secretary of State and First Lady Hillary Clinton officially threw her hat into the ring Sunday. Marco Rubio, the Republican freshman senator from Florida, entered the presidential race Monday.

Gov. Walker continues to send strong signals that he’ll run for president, but his announcement may not come for several months.

This post was updated at 10:30 a.m. E.T.

Anyone who thinks President Obama will shy away from presidential politics in 2016, think again.