Harry Reid wants his deputies to "just relax" in their dispute over leadership posts after his retirement, reports John Harwood.
One GOP leader opened the possibility of a government shutdown in an attempt to stop President Obama from taking executive action on immigration.
Three senators urged Obama to use his executive authority to reduce or eliminate tax breaks for companies that shift their headquarters overseas.
President Obama is in the process of interviewing three candidates for the position at the helm of the central bank: Larry Summers, Janet Yellen, and a dark horse, Donald Kohn.
Authorities declined to comment on a suspect or any other aspect of the investigation, but a senator says the person under suspicion writes a lot of letters to Senate members.
The Senate's senior Democrat and Republican reached a tentative agreement to impose modest limits on the filibuster, the delaying tactic that minority parties have long used to kill legislation and was immortalized in the film "Mr. Smith Goes to Washington."