Today is the deadline for candidates to enter the race to replace retiring Senator Dick Day, but the Democratic and Republican parties didn't wait and have already weighed in.As we reported last night, Minnesota Republicans are backing Waseca businessman Mike Parry in next month's special election.DFL'ers are lining up behind St. Olaf college instructor Jason Engbrecht.Three-term Waseca mayor Roy Srp is running on the Independence party ticket.The special election will be held Jan. 26.Day is stepping down after 19 years to lobby for state-backed Racetrack gambling.