Your argument is that when you win it is honest and when you lose it's because of cheating by Democrats. That's the exact same argument that Trump makes directly and China and Russia imply on social media. The reality doesn't match your statements. Progressives made good headway recently. Jamal Bowman defeated Eliot Engle, a 30yr veteran, Mondaire Jones and Ritchie Torres will likely become the first black, gay representatives, Carolyn Maloney vs Suraj Patel is still up in the air
, but lose one and it's because Democrats are cheaters? (Maloney is ahead by a few hundred, so I assume you think there is cheating there as well.) Progressives are winning where they better represent the electorate. Moderates are winning where they better represent the electorate and that is most of the country. The Democrats did not take the House because of a wave of progressive victories, they did it with a wave of moderate wins in Republican districts. You shoot yourself in the foot screaming voter fraud every time you lose a race that no one ever thought was going to be competitive. I would celebrate the great strides Booker made in making it close and the people he exposed to the progressive agenda in Kentucky before I would rail against the injustice of not giving Booker an election he didn't win.