Sanders is most popular senator, according to constituent poll

A new Morning Consult poll finds that Sen. Bernie SandersBernard (Bernie) SandersDems make history, and other takeaways from Tuesday's primaries Ellison wins Minnesota AG primary amid late domestic violence allegations Ironworker and star of viral video wins Dem primary for Speaker Ryan's seat MORE (I-Vt.) is the most popular senator, according to constituent approval ratings.

Eighty percent of Vermont voters approve of Sanders, while just 17 percent disapprove. The Democratic presidential hopeful was also at the top of the list the last time such a poll was released, in November 2015.

Sen. Susan CollinsSusan Margaret CollinsBudowsky: Collins, Murkowski and Kavanaugh Senate Judiciary announces Kavanaugh's confirmation hearing NRA will spend M to support Kavanaugh for Supreme Court: report MORE (R-Maine) follows closely behind, with 79 percent approval and 13 percent disapproval.

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellHill.TV poll: Majority of Republicans say Trump best represents the values of the GOP The Hill's 12:30 Report Republican strategist: Trump is 'driven by ego' MORE (R-Ky.) keeps his spot as the least popular senator, with just 40 percent of Kentucky voters saying they approve, while 49 percent disapprove.

Republican presidential hopeful Sen. Ted CruzRafael (Ted) Edward CruzMellman: Two worlds — Online and off GOP pollster: Trump dominates political rivals vying for media attention Cruz challenger O'Rourke launching .27M TV ad buy focusing on 'positive' message MORE (R-Texas) is near the middle of the pack, with 55 percent approval and 30 percent disapproval.

And former presidential candidate Sen. Marco RubioMarco Antonio RubioDems make history, and other takeaways from Tuesday's primaries Establishment-backed Vukmir wins Wisconsin GOP Senate primary Florida questions Senate chairman over claim that Russians have ‘penetrated’ election systems MORE (R-Fla.) saw his approval rating drop 5 points and his disapproval shoot up 8 points since November. Rubio dropped his presidential bid in March.

The poll surveyed 62,000 registered voters from Jan. 8 to April 17.