"b-but we might not know the results for a few weeks!"

Trump should firmly declare victory on election night. Do not back down, do not let the Dems have their way on this one. Election night is election night. Fuck your "but we have ballots comin in 9 days later!". No you don't. If they aren't counted on election night they should be tossed. If you can't count them in a timely manner you're not doing it right.