The House Intelligence Committee's Republican minority demanded Thursday that Rep. Adam Schiff, the panel's Democratic chairman, resign from that role over his handling of Russia investigations involving President Donald Trump.

Schiff, who has been one of special counsel Robert Mueller's leading advocates, laid out what called the "evidence of collusion" in a fiery response.

The call for Schiff to step down, submitted during a hearing in a letter signed by all nine of the committee's Republican members, came hours after Trump tweeted Thursday morning that Schiff "should be forced to resign from Congress!"

Trump TWEET

The letter states that Attorney General William Barr's summary of special counsel Robert Mueller's recently delivered Russia report, which says Mueller did not find sufficient evidence to establish that the Trump campaign colluded with Russia to influence the 2016 election, "conclusively" refutes Schiff's past and present claims.

Barr also said that Mueller did not conclude whether Trump obstructed justice, another facet of the probe. Barr and Deputy Attorney General Rod Rosenstein determined that the evidence was "not sufficient to establish" that Trump committed an obstruction-of-justice offense.