Republican leaders are pushing back on an effort to change the House rules to allow members to vote remotely by proxy ahead of an expected vote on the matter Thursday.

“What are the details of this proposal, how will it avoid potential abuses of power, and when do you expect this proposal to be made public for the necessary scrutiny and member input that changing 200 years of House precedent would merit?” House Minority Leader Kevin McCarthy wrote in a letter to House Speaker Nancy Pelosi on Tuesday afternoon.

In the letter, he also raised questions about the 2020 House calendar and how committee business will be conducted going forward. His comments come as Republican members are increasingly opposed to implementing proxy voting, which would allow members who are unable or unwilling to travel during the coronavirus pandemic to instruct another member how to vote on their behalf.