WASHINGTON --The road to re-election may have gotten a little bumpier for two New Jersey Republicans after the House GOP voted to repeal and replace the Affordable Care Act with legislation that could leave 24 million more Americans without coverage.

Reps. Tom MacArthur (R-3rd Dist.), who authored the amendment that allowed Republicans to pass their bill, and Rep. Leonard Lance (R-7th Dist.), who bucked his party and voted no, both were rated as more endangered by the Cook Political Report, a Washington-based publication that tracks congressional races.

In all, the Cook report listed 20 House Republicans as more vulnerable on Friday than they were on Thursday.

"The verdict is in: The House Republicans' repeal and ripoff bill will haunt every single vulnerable Republican through Election Day, regardless of how they voted on the floor," DCCC spokesman Tyler Law said.

The National Republican Congressional Committee touted the legislation, which also allows cuts Medicaid, the health care program for the poor, disabled and elderly, by almost $840 billion over 10 years to help fund tax cuts for corporations and the wealthy.

"Let the Beltway prognosticators who predicted a Hillary Clinton landslide stare into their clouded crystal balls once again," said Chris Martin, a spokesman for the NRCC. "Congressmen Lance and MacArthur's records of success stand in stark contrast to the divisive rhetoric peddled by [House Democratic Leader] Nancy Pelosi and her cabal of out-of-touch liberals."

The Cook report said MacArthur no longer was a sure bet for re-election but still was strongly favored to win. That's the same rating the publication gave to Rep. Rodney Frelinghuysen (R-11th Dist.), who like MacArthur voted for the Republican health care bill.

"Congressman MacArthur has emerged as a leader in the fight to fix our broken health care system, lower premiums so people can afford quality health insurance, and protect the most vulnerable so nobody is left behind," said his campaign consultant, Chris Russell. "The people of Burlington and Ocean counties want a decisive leader and a problem solver, and they have that in Tom MacArthur."

A former national security adviser under President Barack Obama, Andy Kim, has raised more than $43,000 online as he ponders a challenge to MacArthur.

Help me fight against TrumpCare author. I raised $40K to consider run against TomMacArthur who wrote TrumpCare 2.0 https://t.co/VNyejQH5AW — Andy Kim (@AndyKimNJ) May 4, 2017

As for Lance, he now is rated as just a slight favorite to hold the seat in the Cook ratings. He is one of just 23 House Republicans representing districts that supported Democrat Hillary Clinton for president.

His 2016 challenger, Peter Jacob, who had the endorsement of U.S. Sen. Bernie Sanders (I-Vt.), filed to run again. Also running are Lisa Mandelblatt, a teacher in Westfield; Scott Salmon, a lawyer from Scotch Plains; and Linda Weber, a bank vice president from Berkeley Heights.

Lance voted for provisions of the bill in the House Energy and Commerce Committee but was an early opponent of the legislation once it reached the floor.

"I ran on the promise of not simply repealing Obamacare and returning to the status quo but offering something better," Lance said after voting no. "The House-passed bill doesn't achieve these goals."

Campaign Manager Jim Hilk said Lance was the only Republican who could win the district.

"I'm not sure political prognostication 19 months before Election Day is very useful, but it's no secret that 2018 is going to be a challenging year for Republicans nationally," Hilk said.

Jonathan D. Salant may be reached at jsalant@njadvancemedia.com. Follow him on Twitter @JDSalant or on Facebook. Find NJ.com Politics on Facebook.