Ten House Republicans, led by Rep. Chip Roy (R-TX), argued on Wednesday to an appellate court that the House’s pandemic-era proxy voting rules were unconstitutional and pointedly accused Senate Minority Leader Mitch McConnell (R-KY) of flip-flopping his position on them.

The lawmakers made the arguments in an amicus brief, authored by Mountain States Legal Foundation attorneys, after McConnell submitted his own brief in a case that could upend a $1.7 trillion omnibus spending bill that Congress passed in December 2022.