Note: "Southern", as used in this section, refers to members of Congress from the eleven states that made up the Confederate States of America in the American Civil War. "Northern" refers to members from the other 39 states, regardless of the geographic location of those states.

The original House version:

* Southern Democrats: 7-87 (7%-93%)
* Southern Republicans: 0-10 (0%-100%)

* Northern Democrats: 145-9 (94%-6%)
* Northern Republicans: 138-24 (85%-15%)

The Senate version:

* Southern Democrats: 1-20 (5%-95%) (only Senator Ralph Yarborough of Texas voted in favor)
* Southern Republicans: 0-1 (0%-100%) (this was Senator John Tower of Texas)
* Northern Democrats: 45-1 (98%-2%) (only Senator Robert Byrd of West Virginia opposed the measure)
* Northern Republicans: 27-5 (84%-16%) (Senators Bourke Hickenlooper of Iowa, Barry Goldwater of Arizona, Edwin L. Mechem of New Mexico, Milward L. Simpson of Wyoming, and Norris H. Cotton of New Hampshire opposed the measure)