for example, for decades now I've confronted those within the Democratic Party over energy policy...i.e. their unwillingness to accept Nuclear Power...at all...as part of our future...and there are others who don't appreciate the need for government programs to evaluated on their performance and results...having been a businessman, trained in the realities of economics, both micro and macro, I get approving nods from my close conservative friends when I suggest that government programs be constructed and evaluated as if they were "Business Plans" with clearly stated measures for performance...(could go on, but will stop here...although you can do a board search for "Sam Liccardo", mayor of San Jose, CA, to get additional insight)
So, I am aware of the existence of "Far Left" advocates...BUT...the Democratic Party allows them to speak and participate...and at times "influence" policy...but not "control" it. IMO, the choice of Joe Biden for 2020 (and his platform support for Nuclear Power) was an example of the much larger moderate center taking control...and I'm pleased with that...there really is no need to "throw off" the Far Lefties...
Now, when it comes to today's Republican Party...the issues are, again IMO, far greater in magnitude and impact to what makes this country special...I'm talking about democracy and voting rights...by now everyone should know that the 2020 election was the most scrutinized in our history, and it was verified and certified as valid at every single challenge...yet, we have "leaders" and influencers in the GOP who refuse to strongly put down this insurrection that persists...because of this, the "Far Right" nutcases like MTG, who take their lead from Trump, have 'infected' the more moderate Republicans and caused those moderates to 'cave', for need of votes...i.e. the Far Right doesn't just influence the GOP, it is indeed controlling it...that needs to change.