Honestly, the history of the Republican Party since at least the Tea Party era proves the lie to leftists who say stuff like "well if we don't withhold our vote, the Democratic Party will never move left!" In fact, Republicans have shown that it is specifically voting for their candidates faithfully in every election that allows a "radical" faction within a party to have leverage. That you can do that and also criticize candidates for not conforming to your views enough - but you only get leverage to do that by voting for the party regardless, but utilizing primaries, the media and other tactics to try to make your voice heard as much as you can within that party. I know this doesn't make "logical" sense on first blush, and isn't how other forms of political pressure (like boycotts) work, but history has proven that that is how you get leverage within a political party in the United States. And the left has done the right thing on this a lot! But when we don't get our full wishlist (or even when we do, but checked-out people online lie about it - see the myth in the 2024 election that the Dems "weren't doing anything/were the same as Republicans" on trans rights, and then after the results where Dems lost big, a few of them wrongly concluded that they should back off on trans rights!) we pull away and that sends the message that we can't be relied upon. Republicans, though, know how to play the long game and that even if they don't have their preferred person this election cycle, faithfully turning out and then reminding those politicians that they did later will, little by little, over time, result in more of their preferred candidates. This is the story of how the far-right took over the Republican Party - and the left could learn from it, if we wanted to. (Well, I want to, a lot of us want to, but we are too often drowned-out by the ideological-purity, no-knowledge-of-history-from-before-a-couple-years-ago, would-rather-critique-power-than-have-power ignoramus segment of it.)