Trump bitterly attacks top GOP donors after they threaten to pull funds: 'My tax cut made them richer!'

President Donald Trump on Tuesday angrily lashed out at the Koch Brothers, who have long been two of the biggest donors to the Republican Party, because they have started threatening to withhold donations to pro-Trump candidates.

"The globalist Koch Brothers, who have become a total joke in real Republican circles, are against Strong Borders and Powerful Trade," the president wrote. "I never sought their support because I don’t need their money or bad ideas. They love my Tax & Regulation Cuts, Judicial picks and more."

Trump then went on to accuse the Kochs of being ungrateful even though he "made them richer" with his tax cut. He then boasted that they weren't as powerful as many people have made them out to be.

"Their network is highly overrated, I have beaten them at every turn," he wrote. "They want to protect their companies outside the U.S. from being taxed, I’m for America First & the American Worker - a puppet for no one."

The Kochs, whose donations helped fuel the Tea Party movement that opposed former President Barack Obama, have publicly slammed Trump over his immigration and trade policies. In particular, the Kochs have been opposed to Trump's tariffs on steel and aluminum, as well as his policy of forcibly separating immigrant families apprehended at the U.S.-Mexico border.

Charles Koch this past weekend even said that he "didn't care" if the GOP lost the House this fall.