Rubio, Kirk say the four Americans must first be released.
"This is hard," Sen. Bill Cassidy said as he honored the 11 workers who were killed.
A former staffer for ex-Rep. Aaron Schock (R-Ill.) informed the House of a subpoena on Monday as part of a federal investigation.
A bipartisan duo of lawmakers wants to repeal the congressional franking privilege.
With a deal in the works, Reid goes to the floor to pressure the GOP.
Cruz called choice "a first principle" in any education reform effort.
Advocates told Sen. Mitch McConnell he is "standing in the way of progress."
Senators are expected to vote around 5:30 p.m. on a judicial nominee.
The Senate may finally vote on Loretta Lynch's nomination for attorney general.
Reps. Eliot Engel (D-N.Y.) and Matt Salmon (R-Ariz.) have introduced legislation creating a commission to study American drug policies in Latin America and the Caribbean.