Three cases just argued in the Supreme Court have the potential to redefine the power of Congress to hold the president accountable.
President Trump's likely to be acquitted by the Senate in his impeachment trial. But the impeachment's effects won't end until lawsuits are resolved.
An expert on Watergate says that today's House Republicans have taken precisely the opposite position than the GOP took in 1974 on the president's power to withhold documents from Congress.
The impeachment vote is the latest, and most extreme, example of a power struggle between the executive branch and Congress that has existed since George Washington was president.
President Trump has invoked executive privilege to stymie congressional investigators. Another president, Richard Nixon, did the same thing. It helped Nixon hold onto power – but only for a while.
The Constitution gives Congress the power over the executive branch, which it's free to flex.
As the special counsel's investigation of Trump turns into a partisan battle in Congress, here are four key issues to follow.
The president and attorney general can try to keep the findings of Mueller's investigation secret. They'll likely use both the secrecy of grand jury proceedings and executive privilege to do that.
Laws that limit presidential power won't enforce themselves – Congress must act.
Did the attorney general help create a false story on why Comey was fired? Sessions' testimony to Congress provides no answers.
The law says official presidential records must be preserved. How do tweets figure in – particularly when they're altered or deleted?