A week after the worst mass shooting in the nation's history and a nearly 15-hour filibuster waged on the Senate floor by Democrats demanding action, the Senate is set to vote Monday evening on four gun control proposals.
It is unlikely any of the proposals will hit the 60 vote procedural threshold to move forward. However, the votes are forcing senators to once again take a stand in the wake of a mass shooting and debate the controversial issue in a high profile way.
Here's what you need to know:
Dueling Background Check Amendments
There are two competing amendments dealing with improving background checks for gun sales — a Democratic proposal from Sen. Chris Murphy, D-Connecticut and a Republican proposal from Sen. Chuck Grassley of Iowa.
The Grassley amendment seeks to improve the National Criminal Instant Background Check System (NICS) by providing more money and resources to the program. It also adds a mental health component to the required background checks for purchasing guns. The measure calls for commissioning a study on the causes of mass shootings by the Director of the National Institutes of Justice and National Academy of Sciences.