WASHINGTON (AP) — Sen. Tom Carper of Delaware has reintroduced a bill that would transform the District of Columbia into the nation’s 51st state.

Carper is a Democrat and a longtime supporter of statehood for the District. His bill would shrink Washington, D.C., to a small enclave including the White House, the Capitol and the National Mall. The rest of the nation’s capital would become the “State of New Columbia.”

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Last fall, Carper held the first Congressional hearing on statehood for the District in more than 20 years. But the bill didn’t make it to the Senate floor for a vote and had no chance of being taken up by the Republican-led House.

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This year, the bill has 17 co-sponsors in the Senate, which Carper says is a record.

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