The bill was led in the Senate by Republican Sen. Steve Daines of Montana and fellow GOP Sen. Cory Gardner of Colorado. They are among the Senate’s most vulnerable incumbents, and each represents a state where the outdoor economy and tourism at sites such as Rocky Mountain and Yellowstone national parks play an outsize role.

Daines and Gardner persuaded the president to support the bill at a White House meeting this year, even though Trump has repeatedly tried to slash spending for the Land and Water Conservation Fund in his budget proposals. Trump soon tweeted his support for the bill, saying it “will be HISTORIC for our beautiful public lands.″

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