Donald Trump is not having a good day, and he really has no one to blame but himself. After Trump said that we should ban all Muslims from entering the U.S., even people who had previously remained neutral on Trump's candidacy turned on him. Important people. People from his own party, like the RNC Chairman and Paul Ryan. Mayors all the way from the East Coast to London are denouncing the candidate. Even J.K. Rowling got in on denouncing the candidate who pronounced that we should ban all Muslims from the country and that European capitals are too scared to police their own cities after the Paris terrorist attacks in November.

He spent most of Tuesday defending himself and his statements, which only seemed to do more damage. And Trump can't afford that right now. Before yesterday's statements, a new poll showed that Senator Ted Cruz had inched up over Trump in Iowa.

Trump spent the day parading himself around trying to prove himself right, which only dug him into a deeper hole. Exhibit A: He clarified on ABC that he would allow Muslims who traveled overseas to come back from vacation. "They’re a citizen. That’s different. But we have to figure things out.”

At this point his friends are few and far between. [Sen. Cruz offered some faint praise, saying today in a press conference that while he doesn't agree with Trump's details, he's alright with the concept. He said, "I commend Donald Trump for standing up and focusing America’s attention on the need to secure our borders." Rick Santorum also somewhat agrees with Trump saying on Sirius XM Radio's Breitbart News Daily that, "I’ve proposed actual concrete things and immigration law that would have — not the effect of banning all Muslims, but a lot of them because we need to get rid of the visa lottery system, which is the way in which a lot of radicals have come into this country."

But that's about it. Today, Trump made a lot of enemies. Here are some of the people who turned on Donald Trump today:

RNC Chairman Reince Preibus

He told the Washington Examiner, "I don't agree. We need to aggressively take on radical Islamic terrorism but not at the expense of our American values."

Jeff Bezos

Bezos wants to send Trump into space. Yes, really.

Philadelphia Mayor Michael Nutter

Philadelphia's Daily News compared Trump to Adolf Hitler today on their cover, and in response, Mayor Nutter said that he wouldn't Trump into the City of Brotherly Love.

London Mayor Boris Johnson

After Trump said that there are parts of London that police won't enter, Boris Johnson said that Trump's comments are "utter nonsense." He added that he also would avoid visiting New York City just in case he accidentally bumped into Trump. Ouch.

MSNBC's Joe Scarborough

While Trump ranted on Morning Joe, Scarborough cut him off and went to commercial. "You can't just talk," he scolded the billionaire.

Hillary Clinton

Obviously. But the Democratic candidate didn't waste anytime jumping on a chance to tweet about Trump's statements.

J.K. Rowling

She said that Trump is totally, absolutely worse than Voldemort.

Speaker Paul Ryan

He put it best, probably: "This is not conservatism."

The list probably could go on, and on, and on. For his part, Trump doesn't seem to backing down. In fact, all of the rejection seems to be making him even strong. Hold onto your hats, America. This is going to be a crazy election ride.

Images: Scott Olson/Getty Images (2), YouTube (1)