Congress will vote this month on a resolution to disapprove of the White House-backed nuclear deal struck with Iran by the U.S., Russia, China, Britain, France and Germany. The deal aims to limit Iran's nuclear program in exchange for hundreds of billions of dollars in relief from international sanctions.


Republicans who control both chambers of Congress are unanimously opposed to the deal. They need a majority in the House and 60 of 100 votes in the Senate to pass the disapproval resolution.


If it does pass, President Barack Obama has pledged to veto it. At that point, opponents would need to muster two-thirds majorities in both the House and the Senate to override Obama's veto.


In the Senate, 34 senators - the number required to sustain the president's veto - have announced they support the deal. Forty-one votes would be required to filibuster the disapproval resolution in the first place and prevent it from passing.


Here's a breakdown of where the 46 members of the Democratic caucus stand:


SUPPORT - 34


Tammy Baldwin


Barbara Boxer


Sherrod Brown


Tom Carper


Bob Casey


Chris Coons


Joe Donnelly


Dick Durbin


Dianne Feinstein


Al Franken


Kirsten Gillibrand


Martin Heinrich


Mazie Hirono


Tim Kaine


Angus King


Amy Klobuchar


Patrick Leahy


Ed Markey


Claire McCaskill


Jeff Merkley


Barbara Mikulski


Chris Murphy


Patty Murray


Bill Nelson


Jack Reed


Harry Reid


Bernie Sanders


Brian Schatz


Jeanne Shaheen


Debbie Stabenow


Jon Tester


Tom Udall


Elizabeth Warren


Sheldon Whitehouse


OPPOSED - 2


Chuck Schumer


Robert Menendez


UNDECLARED - 10


Michael Bennet


Richard Blumenthal


Cory Booker


Maria Cantwell


Ben Cardin


Heidi Heitkamp


Joe Manchin


Gary Peters


Mark Warner


Ron Wyden


By AP