California Democrats are moving to investigate President Trump, who is accused of corruption and self-dealing.
The investigations are expected to examine a wide range of issues, including immigration raids, the fatal shootings of protesters, Trump's alleged ties to Jeffrey Epstein, and billions of dollars in Middle Eastern investments.
The focus is on accountability rather than impeachment.
A letter from the White House counsel warns that the investigations could bring criminal scrutiny to the lawmakers involved.
In the Nov. 3 election, Democrats gained 256 House seats and 55 Senate seats.