If Trump wins power in 2024 will it be an end to democracy in the US?

Hillary Clinton has spoken. She believes that if Trump were to go for the presidency again in 2024 and win, it would effectively mean the dowfall and end of democracy as we know it in the United States. I believe she may be right. The reason is that this time round Trump would feel even more justified to do what he wanted. He would argue to himself that the voters really wanted him to win in 2020 and because of the fake and false result, giving the White House to Joe Biden, a 2024 victory for him would be a manifestation of the nation calling upon their rightful leader to take charge and make America Awesme Again or some such label. Trump would feel free to pronounce the most Trumpian policies, build walls all over the place, invite Putin to Washington and send half a dozen aircraft carriers to the Indo-Pacific. It wouldn't mean the US would become a total dictatorship because the good old US Constitution and its founding fathers are there to protect all Americans. But I think I know what Hillary has in mind. There would be dangers because we saw many of them emerge alarmingly when Trump was president the first time round. A second term would give him, he would reckon, carte blanche to convert the nation into a Trump Republic. It's still a long way to go and surely there must be enough sensible, democracy-loving senior Republicans left to make sure that their candidate in 2024 will be a noble, honourable man or woman who, if Biden were to fail, would hold the torch of democracy and be a respected and respectable president.