Yes he is worried about the mid terms thats for sure but the attempted insurrection five years ago should make any right minded person fearful of what that madman will do to secure a third term!He and his supporters will do what any despot will do when they lose(or fear that they will lose) the democratic vote ,they will create some sort on national emergency as a pretext to get troops on the streets and declare marshal law and the rest is despot 101.The USA is a very divided country and im sure he will attempt to take advantage of that to his own despicable ends.
It feels like Trump is thinking 'If it's alright for Putin then why not me' ?