I am PART of the base; the part that doesn't use their vote as blackmail.
In that case, you are the part of the base that is *completely ignored* by GOP politicians. If they know that they have your vote no matter what they do, then they have ZERO incentive to take your views or preferences into account when dealing with public policy. Political pressure can only come from those whose support might be lost.
There are people on FR who, if a cackling GOP president slit a baby's throat on national television, would start posting stuff like "that baby probably needed killing" or "our President is playing badminton and the rest of you naysayers are playing mah-jong." The party KNOWS these people exist. They are a captive demographic. The party is free to do whatever they want to attract other voters, because they know that they can do no wrong in the eyes of the 'bots.
If you're going to vote for them no matter what they do, why should anyone care what you have to say?