He's already claiming his first success in the first-in-the-nation caucus state.
But, the fight for the "soul of the Republican Party," it seems, is far from over.
"Paul Ryan has disqualified himself from representing the people of Wisconsin Congressional District 1."
Find out why he says it's the "morally right" thing to do.
Just not the office he hinted at last week.
A 2020 run, regardless of who is president, is all but inevitable.
It's exactly the kind of tough love you would expect from the "Duck Dynasty" star.
Wednesday night's optics are going to be hard to forget, especially for a party whose mascot is the elephant.
Now a whole new race begins for the Republican presidential nominee.
No Speaker of the House has ever lost his party's nomination.
This email to donors suggests he's not yet ready to give up on the Democratic nomination battle.
They plan to use their clout to change the presidential nominating process.
His friend, who is running for his open seat, would need to shift gears, too, if the senator runs for re-election.
He won't be president of the United States, but could be president of Vermont?
North Carolina Republican became the first incumbent to fall in 2016.
Donald Trump and Hillary Clinton can lock in their respective nominations as seven states are headed to the polls.
The math is possible, but is it feasible?
This one might put a smile on evangelicals' faces.
He continues to insist he isn't changing his mind.
There are 303 remaining delegates in next week's final five contests.
A whole new narrative in the presidential election could emerge.