Democratic Congressional Representatives started holding a sit down on the House floor on June 22. Representative John Lewis led his colleagues in a protest against the republican obstructionism, and the refusal of Speaker Paul Ryan to allow a vote on gun control.
Please take a look at this video of Representative Lewis calling his colleagues to action.
Below is a list of the original group of Representatives taking part in the protest.
The Washington Post has put together an interactive chart, which will allow you to look up your Representatives both in the House and the Senate, to see how much money the NRA has given them.
Here are the Senators who voted against background checks back in April.