Obtaining Trump's tax returns, and their untold detail on his business entanglements and tax strategies, has been a top Democratic priority.
Congress' tax-writing committees can by law obtain records from the IRS. Trump, who's refused to release them, might not comply, sparking a court fight and letting Republicans argue that Democrats are going after their political opponents' tax records.
Other areas Democrats could aggressively pursue include:
— Whether Trump violated the Constitution's ban on presidents accepting gifts from foreign governments.
— The administration's decision not to oppose efforts by 20 GOP state attorneys general to invalidate the health care law.
— Trump's separation of migrant children from their parents.
— The FBI investigation of sexual assault allegations against Brett Kavanaugh during his Supreme Court confirmation fight, and whether the White House curtailed it.
— Forcing pharmaceutical executives to testify on drug prices.
— Investigating Interior Secretary Ryan Zinke over a Montana land deal and a rejected Connecticut casino project.