It's happening.
After Rubio's better than expected showing in Iowa, he became The Establishment Candidate to break free from the GOP limbo brought forth by Jeb!'s dismal performance on the campaign trail. He proved himself to the party that he's capable of organizing and getting out the vote -- in addition to not being Cruz or Trump. Even though he came in third, he gained the most. In essence, he won Iowa.
The Week has a nice piece on Rubio and what this means for him, as well as the rest of the race:
"Pressure to drop out will fall hard on candidates who are assumed to be blocking Rubio's path. That means Bush, Kasich, and Chris Christie. Rubio has been talking up his electability. The hypersensitive search for a "Rubio moment" existed for a reason; the political and media class believes Rubio is the Republicans' best shot at defeating Clinton. Her last name and her '90s-style, DNC-inspired political brand evoke America's past. Rubio looks like the America that is coming into being, built by the post-1965 wave of immigration. Rubio wants to make that pitch: "Yesterday is over."
The other reason that Rubio-mania will take off is less inspiring. Rallying around Rubio will just be too strong a temptation for the GOP's elite and the most established organs of the conservative movement. Rubio's candidacy is essentially based on the premise that nothing from the George W. Bush era has to change for the Republican Party.
Nominating Rubio is a statement that the party does not need a course correction. It doesn't need to stand even more firmly with social conservatives or fight with greater zeal and brinksmanship, as Cruz has argued. Nominating Rubio is a statement that the party does not need to find a less aggressive or less interventionist foreign policy, as Trump, Rand Paul, and (to a lesser degree) Cruz have argued. Nominating Rubio is a statement that the party does not need to offer any policy changes to attract working-class whites, as the candidacies of Trump, Mike Huckabee, and Rick Santorum have, to varying degrees, suggested. Instead, they just have to offer Rubio's story of gumption and rising from under his working-class parents' knees."
"With the GOP hierarchy warming to Rubio, the squeeze is suddenly on struggling establishment contenders Chris Christie, John Kasich and Bush, who must convince party higher-ups that they have a reason to continue on. On Tuesday morning, top Bush donors and finance officials held two conference calls to discuss the path forward. On one, according to one participant, there was an acknowledgement of the campaign’s increasingly long odds and an agreement that, barring a strong Bush showing in New Hampshire, many Bush donors would soon bolt to Rubio."
Today, the endorsements really came through. Santorum, after dropping out, endorsed Rubio. Matt Salmon, co-founder of the House Freedom Caucus (AKA Tea Party 2), endorsed Rubio. Pat Toomey, PA Senator, endorsed Rubio. Tim Scott, SC Rep, endorsed Rubio. It goes on and on.
Rubio has officially surpassed Jeb! in 538's endorsement tracker. In other words, he has immense momentum and is on track to securing the nomination. Expect his numbers in NH to rise significantly. Conversely, expect Trump's to crater.
edit: this is particularly good news for me because 1) this all but guarantees I will win my bet with @SuperUltraAusterity (I'm really looking foward to my membership!), and 2) I have a prediction on the line.
edit 2: I've also updated my blog entry on the Iowa caucuses, which includes official delegate counts and some entertaining pieces of media.