On the eve of the midterms, Trump gave his closing speech at the Reflecting Pool, focusing largely on his lavish construction projects in Washington, while Americans struggle to pay for gas.
That same day, the US struck Qeshm Island in Iran, despite his word that there would be no strikes before the election. This immediately put his Iran war back in focus.
If he were deliberately trying to sabotage the Republicans' election chances, these would be quite effective moves.