Read the controversial House Intelligence Committee memo

WASHINGTON (AP) — House Republicans on Friday released a partisan and bitterly disputed memo that they say shows surveillance abuses in the early stages of the FBI's investigation into the Trump campaign and Russia.

The memo, prepared by Republicans on the House intelligence committee, says there was "a troubling breakdown of legal processes" in the Russia investigation.

President Donald Trump, who advocated for the memo's release over the fierce objections of the Justice Department and the FBI, told reporters the document shows "a lot of people should be ashamed of themselves."

"I think it's terrible," Trump said. "You want to know the truth. I think it's a disgrace. What's going on in this country, I think it's a disgrace."

The memo, which the FBI has said is inaccurate and missing critical context, asserts that current and former FBI and Justice Department leaders signed off on a surveillance warrant to monitor communications of a former Trump campaign associate.

The document also asserts that opposition research, conducted by a British spy and funded in part by the Democratic National Committee and Clinton campaign, formed a critical basis for the allegations contained in the warrant application.

They say that research should not have been a basis for the warrant because it contains unproven allegations.

The release of the memo is likely to further divide Trump and his FBI and Justice Department leaders, and the president lashed out anew on Friday morning on Twitter. He has supported the memo release in apparent hopes that it could help undermine the probe being led by special counsel Robert Mueller, which he has called a "witch hunt."

"The top Leadership and Investigators of the FBI and the Justice Department have politicized the sacred investigative process in favor of Democrats and against Republicans - something which would have been unthinkable just a short time ago. Rank & File are great people!" Trump tweeted.