As attention focuses on U.S. President Donald Trump’s expected visit to China this week, Democrats are engaged in a separate domestic political battle against Trump and Republicans ahead of the midterm elections, where they hope to regain control of Congress.

The dispute centers on plans to build a new ceremonial hall at the White House, a project Trump is determined to complete despite legal challenges. Republicans have included nearly one billion dollars in funding for the project within a broader 72-billion-dollar reconciliation package set for debate in Congress this week.

Democrats strongly oppose the Republican approach, especially amid ongoing economic pressures and rising prices linked to the conflict involving Iran. The issue has become a central part of the Democratic campaign message ahead of what is expected to be a highly competitive election season.

The upcoming midterm elections are widely seen as crucial in shaping the future balance of power in Congress and defining the relationship between lawmakers and the White House.