Former President Donald Trump is blasting the Jan. 6 committee’s unanimous vote to subpoena him for documents and testimony.

“Why didn’t the Unselect Committee ask me to testify months ago?” he wrote on his Truth Social social media platform, using a derisive moniker for the House select committee on the Jan. 6 attack.

“Why did they wait until the very end, the final moments of their last meeting? Because the Committee is a total ‘BUST’ that has only served to further divide our Country which, by the way, is doing very badly – A laughing stock all over the World?”

Trump has prevented many of his aides from sharing with the committee, urging them to invoke privilege.

More context: The vote took place at the end of today’s Jan. 6 hearing, as the panel made its case that Trump lied about the outcome of the 2020 election and spurred on a violent mob of his supporters to attack the Capitol.

It’s rare but not without precedent for Congress to subpoena sitting and former presidents for testimony. The action is expected to trigger a prolonged court battle over Trump’s possible compliance, which could even outlast the committee itself.

Chairman Rep. Bennie Thompson said the need to hear from Trump “goes beyond our fact-finding,” framing it as a question of “accountability to the American people.”

Trump has previously derided the panel as an “Unselect Committee of Political Thugs and Hacks” and said its members are “evil, sinister and unpatriotic.”

CNN’s Manu Raju, Jamie Gangel, Annie Grayer and Clare Foran contributed reporting to this post.