It takes 2/3rds majority to expel a member, but in this case the member would not be expelled, but rather declared to not be the winner of the election. I have to wonder if Miller-Meeks would be required to pay back her salary from her time in office?
That's not how it plays out. Meeks was 'provisionally seated'. The House need only vote a simple majority to accept the Committee report that says count ballots until Hart wins.
In 1985, McCloskey's House vote was 236 to 190 to accept the House Committee report -- after McIntyre, the Republican challenger, had been declared the winner in IN-8 by 34 votes one day after the election, and by 418 votes after a state-ordered recount -- just exactly the way Pelosi is seeking to do for Hart.
However, Pelosi made a tactical error -- in '85, the House paid both McCloskey and McIntyre until the Democrat-led House committee released their report and the House voted to accept the report 55%-45% and seat McCloskey.
Rather than hand Trump not just a lit match but the gas as well to attack Nancy for seating a Democrat who accused her state of electoral fraud, suspect Madame Defarge will instruct the House to reject the report (or even kill it in Committee) and instead find Hart a jerb in Resident Xiden's admin like Robotox did for former Rep. Rose (get this : "US Secretary of Defense for COVID-19").