A bill is moving through Congress to give a Congressional seat to the District of Columbia. Guess which party would benefit from that? The problem is that it’s unconstitutional.

If the residents of Washington, D.C. want representation in Congress there are ways of going about it:
1) Return the District of Columbia to Maryland. In that way they will be counted in the population of Maryland for the apportionment of representatives and will be represented in both the House and the Senate;
2) Make Washington, D.C. the 51st state; there is a process for this that should be followed.

But to just say, okay, let’s add another seat to the House of Representatives is unconstitutional. The District of Columbia was specifically formed in the Constitution, to change it would require an Amendment to the Constitution