If I was a far left liberal Democrat circa 2000, here is how I would go about killing off the competition.
I would infect the Republican party with psychopaths, liars, and bigots.
I would then create 24 hour propaganda channels which would diligently dumb down their audience to the point where the rubes could not think beyond the length of a bumper sticker and I would "flood the zone" with so much shit, their critical thinking skills would collapse.
Then I would send in a far left limousine liberal "very pro-choice" New York Democrat to utterly destroy any remaining moral beliefs they might still have.
I would have them accept and celebrate the man's serial adultery.
I would have them turn a blind eye to his stealing the life savings of the elderly.
I would have them turn a blind eye to his stealing donations intended for cancer kids.
I would get them to turn on a dime in their belief that Iraq had WMDs after they vehemently insisted for 15 years Hussein did have WMDs.
I would have them revolt against the invasion of Iraq which they had supported full-throatedly.
I would then have the New York Democrat immediately double the federal deficit in conjunction with the Republican Congress after his predecessor had halved it.
I would have all the Republicans who saw this demonic force exactly for what he is bow down before him and swear their fealty to him.
I would have this demonic force commit so many violations of their beliefs that when the time came, they would be so far gone, they would participate in and/or condone an attempt to overthrow our democracy.
The GOP would then finally be a cult to such a point that the demon could literally do no wrong in their eyes.