The only two House members expelled in the past 150+ years were both only removed after they were convicted of crimes (James Traficant and Michael Myers).

There is a pretty long tradition in Congress that members are not expelled after indictment, only after conviction.

Of course a strong leader pressures their members into resigning when faced with such overwhelming evidence of wrongdoing (Pelosi twisted Anthony Weiner's arm so damn hard he probably couldn't play with himself for months). But Qevin couldn't do that, and neither will Scalise.

If Santos had half a brain he'd be instructing his lawyers to negotiate the best possible plea deal… not grandstanding in Trumpian defiance. But I doubt that the House will vote to oust him prior to a conviction.