Trump has fired all the commissioners of the bipartisan Elections Assistance Commission (EAC). The EAC was set up to after the 2000 election chiefly to administer the HAVA funds. Today it publishes standards for voting equipment and a manages standard form people can send to their state for voter registration.
Trump previously ordered the EAC to add a "proof of citizenship" section to the voter registration form, and this move may be related to that.
https://www.democracydocket.com/news-alerts/trump-fires-election-assistance-commission-leadership/