More than 100 House lawmakers -- at least 98 Republicans and 18 Democrats -- have signed on to a letter formally requesting that President Obama seek congressional approval for any military response to the use of chemical weapons in Syria.

The letter, first written by Rep. Scott Rigell (R-Va.), suggests that failure to seek congressional authorization for military strikes would be unconstitutional. (Read more about the letter in this previous Post Politics report.)

“I’m grateful and encouraged by the strong, bipartisan support this letter has received,” Rigell said in a statement Wednesday. “It’s a clear indication that this issue is not personal to the president, but rather represents common ground in Congress and a deep respect for the Constitution.”

The request by hundreds of lawmakers came as House Speaker John A. Boehner (R-Ohio) also formally requested in a letter that Obama "provide a clear, unambiguous explanation of how military action -- which is a means, not a policy -- will secure U.S. objectives and how it fits into your overall policy" regarding the situation in Syria.

A list of the co-signers, as provided by Rigell's office, appears below. Members whose names appear in italics are Democrats:

Rep. Scott Rigell (VA-02)

Rep. Matt Salmon (AZ-05)

Rep. Mo Brooks (AL-05)

Rep. Scott Garrett (NJ-05)

Rep. Tom McClintock (CA-04)

Rep. Tom Marino (PA-10)

Rep. Dan Benishek (MI-01)

Rep. Tom Rooney (FL-17)

Rep. Steve Pearce (NM-02)

Rep. Tim Griffin (AR-02)

Rep. Justin Amash (MI-03)

Rep. Raul Labrador (ID-01)

Rep. Joseph Pitts (PA-16)

Rep. Trent Franks (AZ-08)

Rep. John Campbell (CA-45)

Rep. Paul Gosar (AZ-04)

Rep. Lynn Westmoreland (GA-03)

Rep.  Joe Wilson (SC-02)

Rep. Charles Boustany (LA-03)

Rep. Tom Cole (OK-04)

Rep. Louie Gohmert (TX-01)

Rep. Austin Scott (GA-08)

Rep. Bill Posey (FL-08)

Rep. Randy Forbes (VA-04)

Rep. Phil Gingrey (GA-11)

Rep. David Roe (TN-01)

Rep. Mark Sanford (SC-01)

Rep. John J. Duncan, Jr. (TN-02)

Rep. Reid Ribble (WI-08)

Rep. James Lankford (OK-05)

Rep. Bill Cassidy (LA-06)

Rep. Stephen Fincher (TN-08)

Rep. Trey Radel (FL-19)

Rep. Chris Stewart (UT-02)

Rep. Lynn Jenkins (KS-02)

Rep. Jeff Duncan (SC-03)

Rep. David McKinley (WV-01)

Rep. Gus Bilirakis (FL-12)

Rep. Joseph Heck (NV-03)

Rep. Dennis Ross (FL-15)

Rep. Billy Long (MO-07)

Rep. Randy Hultgren (IL-14)

Rep. Steven Palazzo (MS-04)

Rep. Kevin Yoder (KS-03)

Rep. Doug Collins (GA-09)

Rep. Michael Fitzpatrick (PA-08)

Rep. Beto O’Rourke (TX-16)

Rep. Zoe Lofgren (CA-19)

Rep. Peter DeFazio (OR-04)

Rep. Kurt Schrader (OR-5)

Rep. Rush Holt (NJ-12)

Rep. William Enyart (IL-12)

Rep. Timothy Walz (MN-01)

Rep. Christopher Gibson (NY-19)

Rep. Trey Gowdy (SC-04)

Rep. Frank Wolf (VA-10)

Rep. Michael Capuano (MA-07)

Rep. Michael Simpson (ID-02)

Rep. Michael McCaul (TX-10)

Rep. Thomas E. Petri (WI-06)

Rep. Robert Pittenger (NC-09)

Rep. Walter Jones (NC-03)

Rep. Tom Latham (IA-03)

Rep. Richard Nolan (MN-08)

Rep. Jim McDermott (WA-07)

Rep. Kerry Bentivolio (MI-11)

Rep. Mike Coffman (CO-06)

Rep. Sean Duffy (WI-07)

Rep. Bruce Braley (IA-01)

Rep. Morgan Griffith (VA-09)

Rep. Brad Wenstrup (OH-02)

Rep. Mark Amodei (NV-02)

Rep. Roger Williams (TX-25)

Rep. Doug LaMalfa (CA-01)

Rep. Brett Guthrie (KY-02)

Rep. Sam Farr (CA-20)

Rep. Steve Daines (MT-At Large)

Rep. Robert Hurt (VA-05)

Rep. Steve Southerland, II (FL-2)

Rep. Michele Bachmann (MN-06)

Rep. Ralph Hall (TX-04)

Rep. Randy Neugebauer (TX-19)

Rep. Robert Wittman (VA-01)

Rep. Anna Eshoo (CA-18)

Rep. David Schweikert (AZ-06)

Rep. Todd Rokita (IN-4)

Rep. David Loebsack (IA-02)

Rep. Scott Tipton (CO-03)

Rep. Frank LoBiondo (NJ-02)

Rep. Earl Blumenauer (OR-03)

Rep. Sam Johnson (TX-03)

Rep. Tom Price (GA-06)

Rep. Mark Meadows (NC-11)

Rep. Paul Broun (GA-10)

Rep. Markwayne Mullin (OK-02)

Rep. Steve Stockman (TX-36)

Rep. F. James Sensenbrenner (WI-05)

Rep. Chris Collins (NY-27)

Rep. Diane Black (TN-06)

Rep. Daniel Webster (FL-10)

Rep. Peter Welch (VT)

Rep. Lou Barletta (PA-11)

Rep. Tim Murphy (PA-18)

Rep. Gregg Harper (MS-03)

Rep. Jim Jordan (OH-04)

Rep. Ted S. Yoho (FL-03)

Rep. Bill Flores (TX-17)

Rep. Michael Burgess (TX-26)

Rep. Jim Matheson (UT-04)

Rep. Cory Gardner (CO-04)

Rep. Alan Nunnelee (MS-01)

Rep. Jason Smith (MO-08)

Rep. Charles Fleischmann (TN-03)

Rep. Tim Walberg (MI-07)

Rep. Marsha Blackburn (TN-07)

Rep. Collin Peterson (MN-7)