The District of Columbia was created in 1790 as a federal enclave and is governed under the District Clause of the Constitution. Residents got a presidential vote via the 23rd Amendment (1961) but still have only a non-voting House delegate and no senators.
The most-discussed proposal would admit "Washington, Douglass Commonwealth" as a state, retaining a small federal-district zone (Capitol, White House, federal buildings) under congressional control. The House passed a statehood bill in 2021; the Senate did not act.
Constitutional questions include whether statehood requires repeal of the 23rd Amendment and whether the District Clause precludes admission. Political objections include the partisan implications of two new likely-Democratic senators.