Henry Olsen points out Paul Ryan's stealing of the Democratic Party issue of security (see, among other sources, FDR's 1944 SOTU). In fighting Progressivism, we often need to turn Progressive guns against Progressivism: capture their commanding heights and use their own weapons against them. Leftist policies destroy Social Security, Medicare, etc. This does not show bad faith in compromising with these New Deal policies--quite the contrary; it's part of a much larger strategy.
As bad as California is, it would be far worse without the consensus that supported the initiative and referendum measures against racial preferences, property tax hikes, and so on. See Edward Erler's argument for using the Progressive means to conservative ends: Keep your eye on the ball and the real enemy--the administrative state.