Sanders is most popular senator, according to constituent poll

A new Morning Consult poll finds that Sen. Bernie SandersBernard (Bernie) Sanders If Congress takes no action, the Social Security trust fund will become depleted in 2034 Ex-campaign manager: Sanders is still eying another presidential bid DNC chair backing plan to cut superdelegates opposed by Dem lawmakers 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 CollinsDHS secretary defends Trump administration's migrant policies White House faces growing outcry over migrant family policies GOP senators push for clarification on migrant family separations MORE (R-Maine) follows closely behind, with 79 percent approval and 13 percent disapproval.

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellCongress had a good couple of weeks — now let's keep it going McCarthy: 'The Mueller investigation has got to stop' McConnell: Mueller 'ought to wrap it up' 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 CruzUS-China trade war is just the start of the struggle for global order Dem lawmaker: Migrant family separation policy 'is on all of us' Cruz wins charity basketball challenge against Jimmy Kimmel 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 RubioSenate rejects effort to boost Congress's national security oversight The Memo: Summit gives Trump political boost — with risks The Hill's 12:30 Report — Trump, Kim make history with summit 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.