They could be jailed and prosecuted. The constitution doesn't protect them against felonies, which these would be.
... of course, that wouldn't be the end of it, but good gravy would that be messy times.
... of course, that wouldn't be the end of it, but good gravy would that be messy times.
They would be subject to whatever punishments their fellow Representatives (or Senators) decided to impose (including possibly expulsion).