Per the Constitution, each House is "the judge of the qualifications and elections of its Members." About 20 years ago, Indiana officially certified that the Republican had narrowly won a House seat there. The House, then controlled by the Democrats, then "recounted" the votes as requested by the losing Democrat, determined that the Democrat had won, and seated him. Bottom line: no Representative or Senator is "duly elected" until the House or Senate swears him/her in as a new Member. Normally this question is routine, and whatever the state election officials certify is followed. But it does not have to be routine.
Billybob
My point exactly. Thanks!