Nearly 200 Democrats in the US Congress are joining forces to file a legal case against President Donald Trump over receipt of payments from foreign governments via his businesses. The plaintiffs accuse Mr Trump of violating the constitution's emoluments clause, prohibiting receipt of gifts without congressional approval.
They say this is the largest number of legislators ever to sue a US president.
State officials and private businesses are suing Mr Trump in similar cases.
The attorneys general of Maryland and the District of Columbia announced their lawsuit on Monday.
The White House has denied their allegations.
Spokesman Sean Spicer blamed "partisan politics" for the attorneys general lawsuit.
