According to a Washington Post article about Alabama Senate candidate Roy Moore, in the spotlight for an apparent history of sexual relations with teenagers, congressmen are trying to...
pressure GOP nominee Roy Moore to withdraw from the Alabama Senate race amid allegations of sexual misconduct, declaring him “unfit to serve” and threatening to expel him from Congress if he were elected.
That last part is the interesting one. Do members of Congress have the power to "expel" a democratically (if controversially) elected senator from the United States Congress?