President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE trounced Ohio Gov. John Kasich (R), Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.) and others in hypothetical New Hampshire presidential primary matchups, according to a new Suffolk University poll.

Roughly 68 percent of voters polled said they favored Trump over Kasich, who garnered support from 23 percent of voters.

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Trump also beat out Flake, with 72 percent of voters favoring Trump, and 15 percent of voters favoring Flake.

Kasich and Flake have been two of Trump's most outspoken critics in the Republican Party, and speculation has swirled around the two launching presidential bids to challenge Trump for the Republican nomination.

The Ohio governor has proved to be a thorn in the administration's side, taking opposing stances on issues such as health care and immigration.

Flake publicly ripped into Trump and compared his rhetoric to that of former Soviet dictator Josef Stalin earlier this year.

Kasich and Flake have both lamented the current state of the GOP under Trump, publicly questioning if there is room for them in the party.

The poll also looked at hypothetical matchups between Trump and Sen. Marco Rubio Marco Antonio RubioOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats step up hardball tactics as Supreme Court fight heats up Press: Notorious RBG vs Notorious GOP MORE (R-Fla.), as well as Trump and former Massachusetts Gov. Mitt Romney Willard (Mitt) Mitt RomneySenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE, who's currently running for a Utah Senate seat. In both cases, Trump also handily wins: 66 percent of voters favored Trump over Rubio, while 63 percent favored him over Romney, according to the poll.

The poll was conducted among 800 likely New Hampshire general election voters April 26-30.

The margin of error is plus or minus 3.5 percentage points.