Repealing Obamacare will be the first priority of congressional Republicans when Donald 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 takes office in January, House Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE told CBS's "60 Minutes."

"Well, the first bill we're going to be working on is our Obamacare legislation," he said in an interview airing Sunday night, though he declined to offer a timetable.

"We want to make sure that we have a good transition period, so that people can get better coverage at a better price."

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When pressed by anchor Scott Pelley, who asked about a three-year transition, Ryan said, "I don't know the answer to that right now. What we know is we have to make good on this promise. We have to bring relief as fast as possible to people who are struggling under Obamacare."

In its place, he told "60 Minutes," Republicans will pass a "patient-centered healthcare" that gives people access to "affordable healthcare coverage."

But the Wisconsin Republican, echoing the president-elect, said some of the healthcare law's most popular provisions will remain intact.

He favors maintaining provisions of Obamacare that allow children to stay on their parents' healthcare plans until the age of 26 and preventing health insurance companies from denying care to those with preexisting conditions.