Mitt Romney's national favorability rating is even lower than Republican presidential candidate Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE's, according to a new poll.

The 2012 GOP presidential nominee is viewed favorably by 23 percent of registered voters, according to the left-leaning Public Policy Polling survey released Thursday, while 65 percent view him unfavorably.

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Trump is viewed favorably by 29 percent, while 63 percent hold an unfavorable view.

Romney denounced Trump during a major speech earlier this month, calling him a "fraud." He's since campaigned against the businessman.

The poll saved its harshest numbers for Congress in general: A whopping 79 percent of voters disapprove of the job Congress is doing, while 13 percent approve.

Clinton would beat Trump by 7 points and Sanders by 8 points, the poll found. The margins are narrower for Cruz: Clinton would beat the Texas senator by 3 points and the Vermont senator by 7 points.

GOP candidate John Kasich leads both Democrats in hypothetical head-to-head races. The Ohio governor tops Clinton by 4 points and Sanders by 3 points.

The two Democrats also lead both Romney and Ryan in hypothetical head-to-heads.

Romney and Ryan, who ran on the GOP White House ticket in 2012, have both repeatedly denied interest in running for president this year, despite the potential for a contested convention to select a nominee.

The survey of 1,083 registered voters was conducted March 24–26 via landlines and the Internet with a margin of error of 3 percentage points.