The other Dan Sullivan in Alaska has drawn the most attention, but both parties are quietly trying to use little-known candidates in other battlegrounds to siphon votes, too.
Dan J. Sullivan, a retired teacher in Alaska, was recruited by Democratic operatives to join the race against Senator Dan S. Sullivan, a Republican, whose allies have been left worrying that voters will be confused.
Representative Haley Stevens has been less than enthusiastic about Dr. Abdul El-Sayed, injecting late intraparty tensions into a race that could decide Senate control.