WASHINGTON — The White House and the Republican majorities in Congress have big plans for rolling back the Dodd-Frank Act and other aspects of post-crisis financial reform, but there are growing doubts that they will be able to deliver on the sweeping changes that they've promised.

Battles over health care, tax reform and other priorities are liable to eat up both time and political capital, while President Trump's team may have overpromised on economic growth, which could further sap policymakers' ability to enact reform.

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