All conservative except Dean Heller. Mostly liberal Democrats on the D side.
Best vote Ed Markey has made apart from his present vote on bombing Assad.
John Barrasso R WY
Mark Begich D AK
Sherrod Brown D OH
Tom Coburn R OK
Michael D. Crapo R ID
Ted Cruz R TX
Michael B. Enzi R WY
Kirsten E. Gillibrand D NY
Dean Heller R NV
Patrick J. Leahy D VT
Mike Lee R UT
Joe Manchin III D WV
Edward J. Markey D MA
Jerry Moran R KS
Christopher S. Murphy D CT
Rand Paul R KY
Jim Risch R ID
Pat Roberts R KS
Bernard Sanders I VT
Jeff Sessions R AL
Elizabeth Warren D MA
Looks like Marco Rubio sided with Harry Reid & Obama on this one.