It's the Republican National Committee, and they've done this to me as well. Unfortunately for them my cell phone number is on the national Do Not Call registry and they've now been reported to the feds for violating that (I've been on the registry for well over 31days). If you want to manually remove yourself from their "spam" calls, dial their membership services line at 202-863-8743 and give them your number.
Sorry, Sabrina, but you're mistaken. The national "Do Not Call" registry applies only to commercial solicitors. It specifically allows political phone calls like this, even to numbers on the list.