Given that Elon wants to torpedo this spending bill over his precious EV credits, I imagine the honeymoon phase is assuredly over and he won't be successful in influencing the administration here.
You can't just make up motivations for people. He has said repeatedly that the government should get rid of subsidies. When the government then gets rid of subsidies, people say he is mad about that. A citation is very much needed.
Trump may not care about reelection but congressmen do.