If I drive drunk and then hit someone with my car, I'm not immediately forgiven just because I called 911 and offered to pay the hospital bill.
Also, it wasn't "just a retweet". He literally wrote that he supported it.
I don’t like most politicians, but if Bernie Sanders (someone I do like) blanket retweeted a crypto scam, I would say that that’s bullshit. Unless he was the biggest moron on the planet, he would have to know that a retweet will be read as an endorsement by a large number of people.
A public figure, particularly a high-profile elected figure, particularly a figure who is in charge of how laws are enforced, should be held to a high standard.
But as other people have pointed out, it actually wasn’t just a retweet.