Renowned Twitter troll Donald Trump announced his campaign for president today and is likely to qualify for the GOP’s upcoming presidential debates. Here’s a look at some of his “finest” Twitter moments.

5) Vaccination ‘Truth’

The GOP apparently didn’t have enough anti-vaxxers running for president. As Mother Jones notes, Trump has linked vaccinations to autism and even thanked himself for spreading the misinformation:

I am being proven right about massive vaccinations—the doctors lied. Save our children & their future. — Donald J. Trump (@realDonaldTrump) September 3, 2014

So many people who have children with autism have thanked me—amazing response. They know far better than fudged up reports! — Donald J. Trump (@realDonaldTrump) September 4, 2014

4) ‘We Need Global Warming!’

Trump has a lot of thoughts on climate change, which he thinks is phony since it is cold in New York during winter:

It’s freezing and snowing in New York–we need global warming! — Donald J. Trump (@realDonaldTrump) November 7, 2012

This very expensive GLOBAL WARMING bullshit has got to stop. Our planet is freezing, record low temps,and our GW scientists are stuck in ice — Donald J. Trump (@realDonaldTrump) January 2, 2014

3) Only Trump Could’ve Prevented The Amtrak Disaster

Immediately after this year’s deadly Amtrak derailment, Trump touted his own expertise in building and said that only by electing him could Americans improve the country’s infrastructure:

The only one to fix the infrastructure of our country is me – roads, airports, bridges. I know how to build, pols only know how to talk! — Donald J. Trump (@realDonaldTrump) May 13, 2015

2) Obama Bombshell That Wasn’t

Trump hinted at an October Surprise moment in the 2012 election that would expose “something very, very big concerning the president of the United States.”

Trump, who spent months insisting that President Obama’s birth certificate was fake, finally released his bombshell, which was just a video of him promising to make a $5 million charitable donation if Obama released his college and passport records:

“For President Obama not to accept five million dollars (or much more) for his favorite charity can only mean one thing – the records are very bad,” Trump said after the president ignored his video. “Obviously he wasn’t born in this country or, if he was, he said he wasn’t in order to receive financial aid and in order to have a clear and very easy path into a college or university.”

Trump also wondered if Obama would “start a war or major conflict” to win re-election and suggested that the president may have killed a woman who knew the truth about his phony birth certificate:

How amazing, the State Health Director who verified copies of Obama’s “birth certificate” died in plane crash today. All others lived — Donald J. Trump (@realDonaldTrump) December 12, 2013

1) Anti-Obama Revolution!

Donald Trump was heavily courted by Mitt Romney’s presidential campaign and ultimately won his endorsement. While in Boston for the Romney campaign celebration, Trump was disgusted that his candidate was about to concede and called for a revolution:

War on Christmas Bonus

Trump, who is apparently not an active Google user, couldn’t find a statement from Obama about Christmas, so he went ahead and tweeted that Obama is trying to marginalize Christmas in favor of Kwanzaa: