> [T]here's a point when a politician is advocating for something so egregious that supporting said politician can no longer be ignored.

There are no words by which I can be sufficiently emphatic in my disagreement.

Politics [whether at the national level, or "mere" office politics] is the process of making group decisions. Democratic politics are built upon a shared group consensus. The only way this process can be valid -- that is, to have an outcome which accurately reflects the communal beliefs of the group -- is if the members can express themselves unhindered by fear of repercussion.

The only response in a democratic system to ideas with which you disagree is to argue against and persuade their audience to no longer support them. To do otherwise is to repudiate the very premises and processes upon which modern representative government is built.