Updated at 6:24 p.m. ET
Wisconsin Gov. Scott Walker — best known for his high-profile
fight with his state's unions
"I'm in. I'm running for president because Americans deserve a leader who will fight and win for them," Walker
tweeted Monday morning
Later, at a rally in Waukesha, Wis., Walker said: "Americans want to vote for something and for someone. So let me tell you what I'm for: I'm for Reform. Growth. Safety."
The New York Times
Politico
"Caucus insiders pointed to the Wisconsin governor's success in taking on unions and winning a recall election and then re-election in 2014, and lauded his appeal to middle class voters. But they also pointed to the two-term governor's vulnerabilities: 87 percent of Granite State Republicans say he couldn't win New Hampshire right now, which echoes national polling showing Walker running strong in Iowa, a neighboring Midwestern state, but falling to the middle of the pack in New Hampshire."
The Hill
"An Iowa win would help Walker position himself as the main conservative challenger to Bush. If he locked in that status with an adequate performance in New Hampshire and a stronger one in more ideologically friendly South Carolina, other conservatives are likely to drop out. Walker would be perfectly placed to hoover up their support."The bad news: Skeptics question whether Walker ... has the personal dynamism to deliver on his potential."Copyright 2016 NPR. To see more, visit http://www.npr.org/.