It is a rather unspoken rule in the US that minors living in the White House are not to be talked about or hounded. Even by private citizens. When it happens, and it does, even the adult children of past President's, on both sides, will band together to denounce the actions. These are children who have no say in what is happening. Talking about First children is considered crass and looked down on.
Michelle Obama released a new book on November 15th, is headed out on a book tour and even she told the press to leave her children alone.
That being said, it is encouraging that his announcement is being largely brushed over by the media and even people who voted for him the first time have said not again.
A clause in the 14th Amendment may stop him all together since Congress will never actually be able to commit to charging him with anything. States can leave him off ballots due to this clause, even if he did win a Primary.
There are still plenty of Trump supporters here , but hopefully the tide will change as it is appearing to do. Most of the candidates he backed lost this November. He is toxic to any republican who wants to keep their job.
What happens will depend on what Biden does. He is a very unpopular President and his ratings are low. So are Kamala's. The best thing they could do is allow someone else run for 2024 if they want to keep the White House. In my opinion.