Lobbyist
Congressmen vote if it should be a law or not. Majority rules. If the bill has been vetoed, or rejected by the president, 2/3 of the congressmen must vote yes.
Four were for the bill, four against. See names at www.petrocenter.com
There has been no bill presented to the House floor for a vote on universal background checks, so there has been no vote.
A lobby is a group that tries to get a Congressman to vote a certain way. They are also referred to as lobbyist.
politicians after a vote
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A filibuster.
Senators are allowed to speak for or against a bill and a vote can not be taken until the everyone has had a reasonable opportunity to speak. However, there is a tactic known as the filibuster in which a senator or a group of Senators speak for no purpose except to delay a vote on the bill. The Senate can vote to end debate but this action currently required a 60% majority , so unless 60% of the senators want to end debate and get a vote, the debate can go on until the bill is withdrawn without a vote and the bill dies .
Staffers do have dealings with lobbyists, but they are not allowed to vote on bills.
If they are on their way to a vote or if they dont want to be arrested
This is called Filibustering, or "To talk a bill to death."
lobbying