If you continue to vote for politicians who do unacceptable things, then what leverage do you have over them to make them do right? If a Republican can scare you into voting for him or her out of simple fear of the Democrat, then that Republican may act in any manner he or she sees fit, and you will walk to the polls and cheerfully cast your ballot for the lesser of two evils.
Who doesn't understand? I submit it is you.
Sure, allow the Dems to win EVERY election, from now until the SECOND COMING, and what good will THAT do?
By NOT voting to keep GOPers in office, no matter how bad, you get something far worse. Half a loaf is better than none plus you owe three loaves. No one, NOT A SINGLE CANDIDATE/PARTY, " learns a lesson ", especially NOT the " lesson the UNAPPEASEABLES imagine they're sending, when either bounced from office or not elected.
Tell me, just WHAT " lesson " did the GOP " learn ", when Clinton won in '92? It certainly was NOT the one the UNAPPEASEABLES thought that they were sending, when they refused to help re-elect Bush 41.