One of the most prominent members of Robert Mueller’s special counsel team, who has since become an MSNBC legal analyst, will leave the network so he can headline a fundraiser for Joe Biden’s presidential campaign.

Andrew Weissmann’s decision to host the fundraiser for the presumptive Democratic nominee appears to violate the network’s policy for creating the “appearance of a conflict of interest,” which is why he said he’ll be leaving the network if it happens as planned, according to the Washington Free Beacon.