For some perspective from the UK, only about 30-35% of the UK electorate actually support ReformUK, the party this fascist scumbag currently owns.
And a considerable portion of that % are only supporting because they're being lied to consistently by him, his cronies and a sizeable portion of our news organisations.
35% support would likely be enough to deliver that ass clown into power though as our archaic voting system is shit.
Our other big right-wing party basically committed suicide, and most of their non pensioner voters have since fled to ReformUK, as well as a fairly consistent trickle of politicians defecting from the Conservatives to ReformUK.
If the Conservatives hadn't gone completely insane they may well have split the vote between them, but it all seems to be coalescing around ReformUK at the moment.