Why I am a Democrat

[Bluenorthwest]

9. Then why is it she was a Republican during several of those Democratic victories?

She was a Southern Strategy Reagan Republican. The GOP at that time was ruthlessly anti gay, stridently anti choice, Reagan used nasty rhetoric about 'welfare queens' and refused to take any action of any kind on the AIDS crisis, which began and flourished during his administration.
Warren remained a Republican through all of that. She says she left the Party only because they differed on 'markets' and she does not say a word about the bigotry, the anti choice policies, the racism, the murderous policies of silence....
You don't seem to remember those times at all. Republican equaled bigoted right wing hate monger. And she was one. Would be still, save for quibbles about 'markets'.