Yes, the president’s party loses an average of about 30 seats in midterm elections.
There are three basic reasons that Republicans lost the House:
Last year, he hinted at a an Australian-style system, where the government covers basic health care, and private insurance covers the rest.
The good news is that Trump can address health care and political divisions at once.
The GOP has spent very little effort building up the Trump coalition, losing ten of 12 blue districts Trump won in 2016 while Democrats won 18 of 25 red districts Hillary Clinton won.