Former New York Mayor Mike Bloomberg announced Wednesday that he’s ending his campaign in which he spent more than $500 million to sustain. In Super Tuesday’s primary race, Bloomberg was only able to win 44 delegates. Axios was the first to report the news.

Bloomberg made the announcement on Twitter Wednesday.

Fox News reported that Bloomberg spentĀ $224 million in ad spending in just Super Tuesday states. It means, that he spent $5.1 million per delegate that he earned. According to Fox, “the former New York City mayor’s most expensive delegates came from Texas, where his $54 million in advertising bought him a total of four delegates.”

“Three months ago, I entered a race to defeat Donald Trump. Today, I’m leaving for the same reason. Defeating Trump starts with uniting behind the candidate with the best shot to do it,” said Bloomberg. “It’s clear that is my friend and a great American Joe Biden.”