Far far below 50%. The media tricked some people into supporting Trump by perpetuating his obvious lies unchallenged, but now that people see what Trump is doing he is underwater on all issues.
Most other contemporary and historical parallels of authoritarians show far higher popularity of the authoritarian. Trump is nowhere close.
The biggest risk to the US is that the media is completely compromised, as are leadership at many institutions. Even in Silicon Valley, the loudest and most vocal leaders are self-destructively supporting this madness that will destroy the US's wealth, and their future wealth gains too.
The media tricked some people into supporting Trump
You could almost make this case in 2016, but anyone who fell for Trump in 2024 will just fall for the next con man to come along. At some point we have to take responsibility for our own choices and stop blaming the media.
The truth about Trump was out there, and it was not hard to find.
Added here due to rate-limiting:
2024 was right after voters had seen Biden at that debate, while all the "responsible" people insisted he was sharp and smart. It really was more unique than its given credit for.
Both candidates were a disgrace to the parties who propped them up. However, nothing Biden said was any worse than what Trump said about immigrants eating peoples' pet dogs and cats.
At the Biden/Trump debate, the choice was between malevolent, incoherent senility and plain old garden-variety senility, and the voters choose poorly. At the actual election, there were even fewer excuses for voting for Trump, as Biden was no longer in play.