The nine Republicans on the House Intelligence Committee formally called for California Rep. Adam Schiff to step down as chairman of the panel Thursday, alleging the California Democrat “abused” his position by “knowingly spreading false information” regarding collusion between the Trump campaign and Russian government.

“Your willingness to continue to promote a demonstrably false narrative is alarming,” reads a letter submitted to Schiff, which Texas Rep. Mike Conaway read aloud at the beginning of a committee hearing.

“We have no faith in your ability to discharge your duties in a manner consistent with your Constitutional responsibility and urge your immediate resignation as Chairman of this Committee.”

Republicans said since before President Donald Trump’s inauguration, Schiff has been at the center of a “well-orchestrated media campaign” claiming the Trump campaign colluded with Russians to influence the 2016 election.