Washington CNN  — 

Lawmakers have some homework for their summer break: deciding how they want to vote on the Iran nuclear deal. On Wednesday, President Barack Obama got confirmation from his 34th senator backing his proposal, which gave the President a veto-sustaining coalition that would ensure passage of the deal.

While the GOP-led Congress has scheduled action on legislation in September to block the deal, President Barack Obama has pledged to veto it. That means Republicans would have had to pick up 44 Democrats in the House and 13 in the Senate to reach the two-thirds majority needed to override a presidential veto – assuming all Republicans are present and vote for it.

Here’s where things stand now, of the Democratic lawmakers who have committed.

House Democrats who are a “no” on the deal (18 of 44 needed to override a potential veto):

Brad Ashford, Nebraska

Brendan Boyle, Pennsylvania

Ted Deutch, Florida

Eliot Engel, New York

Lois Frankel, Florida

Gene Green, Texas

Alcee Hastings, Florida

Steve Israel, New York

Dan Lipinski, Illinois

Nita Lowey, New York

Carolyn Maloney, New York

Grace Meng, New York

Donald Norcross, New Jersey

Kathleen Rice, New York

David Scott, Georgia

Brad Sherman, California

Albio Sires, New Jersey

Juan Vargas, California

Note: 151 House Democrats signed a May letter supporting the then-unfinished Iran negotiations, though only 146 are voting members, and none have come out against the deal since it was completed.

Senate Democrats who are a “no” (4 of 13 needed to override a potential veto):

Ben Cardin, Maryland

Joe Manchin, West Virginia

Bob Menendez, New Jersey

Chuck Schumer, New York

Senate Democrats who are a “yes” (42 of 41 needed to prevent a final vote):

Tammy Baldwin, Wisconsin

Michael Bennet, Colorado

Richard Blumenthal, Connecticut

Cory Booker, New Jersey

Barbara Boxer, California

Sherrod Brown, Ohio

Maria Cantwell, Washington

Chris Coons, Delaware

Joe Donnelly, Indiana

Dick Durbin, Illinois

Tom Carper, Delaware

Bob Casey, Pennsylvania

Dianne Feinstein, California

Al Franken, Minnesota

Kirsten Gillibrand, New York

Heidi Heitkamp, North Dakota

Martin Henrich, New Mexico

Mazie Hirono, Hawaii

Tim Kaine, Virginia

Angus King, Maine (Independent but caucuses with Democrats)

Amy Klobuchar, Minnesota

Patrick Leahy, Vermont

Edward Markey, Massachusetts

Claire McCaskill, Missouri

Jeff Merkley, Oregon

Barbara Mikulski, Maryland

Chris Murphy, Connecticut

Patty Murray, Washington

Bill Nelson, Florida

Gary Peters, Michigan

Jack Reed, Rhode Island

Harry Reid, Nevada

Bernie Sanders, Vermont (Independent but caucuses with Democrats)

Jeanne Shaheen, New Hampshire

Brian Schatz, Hawaii

Debbie Stabenow, Michigan

Jon Tester, Montana

Tom Udall, New Mexico

Mark Warner, Virginia

Elizabeth Warren, Massachusetts

Sheldon Whitehouse, Rhode Island

Ron Wyden, Oregon