Not going to be easy defending that record.

Via Roll Call:

Every vulnerable Senate Democrat up for re-election in 2014 voted with President Barack Obama at least 90 percent of the time in 2013, according to CQ Roll Call’s latest vote studies, released Monday.

Arkansas Democrat Mark Pryor broke with the president most often, opposing him in 10 percent of all 2013 votes where the administration stated a preferred outcome. Sens. Mark Begich, D-Alaska, Mary Landrieu, D-La. and Kay Hagan, D-N.C., voted for Obama’s position 97, 97, and 96 percent of the time, respectively. Of those four, only Begich serves with a Republican who has bucked the GOP to back Obama with any frequency.

Support for Obama’s initiatives from incumbent Democrats who are favored but not safe was just as high if not higher than from vulnerable members: Jeanne Shaheen of New Hampshire and Mark Warner of Virginia supported the president in 99 and 97 percent of votes.

On the flip side, Republican senators who are wary of primary challengers from the right opposed Obama so often that the president’s support from GOP senators in 2013 — 40 percent — was the lowest of his five years in office. Senate Minority Leader Mitch McConnell, R-Ky., opposed Obama 67 percent of the time. Sens. Pat Roberts, R-Kan., Thad Cochran, R-Miss., Lindsey Graham, R-S.C., and John Cornyn, R-Texas, opposed the Obama position on 66, 50, 48 and 66 percent of votes respectively.