Trump talked up alternative therapies and always emphasized that the vaxx should be voluntary, which means he was anti-mandate. Trump knew the commies wanted an extended lockdown then a forced vaxx, so his Operation Warpspeed got the vaxx out before full approval so that it couldn’t be justifiably forced. He had to say it’s a good product or else they would’ve went back to their original plan. He’s not a biologist, so maybe he didn’t know that it was shit, or maybe he did know and his emphasis on it being voluntary was a hint to critical thinkers that the vaxx is shit.