What would happen to Congress if Washington, DC became the 51st state?

Source: https://theconversation.com/profiles/dudley-poston-703355“>Dudley Poston, The Conversation, June 6, 2019

…. Statehood for the district has been opposed by Republicans in the past, mainly because the district is heavily Democratic.

About 76% of the registered voters in the district are Democrats, while just 6% are Republicans. Most of the others have no party affiliation, though a few are Libertarians or Green Party members.

This occurs even though, with over 700,000 residents, the district is larger in population than two states: Vermont and Wyoming. Two other states have just a few more residents than the district, Alaska with 737,000 people and North Dakota with 760,000.

But those four states each have one representative in the U.S. House and two senators. Washington, D.C. has neither a representative nor any senators. ….

…. What will happen politically if the district becomes the 51st state? How will the distribution of representatives and senators among the states change? The answers show why Republicans consistently vote against statehood for the district. ….