Background Checks

The Orlando shooter had been thoroughly vetted by multiple agencies before he bought his guns:

The company said Mateen had been subject to a detailed screening and checks by U.S. law enforcement, which reported no findings to G4S.
G4S first screened Mateen when he was hired in 2007 and then again in 2013 as part of an annual re-screening of a percentage of employees.
The screenings included a psychometric test, a drug test, a 7-year criminal history, employment and education check, credit report, social security and driver’s license check and a physical fitness test.
He received a firearms license issued by the state of Florida and a security officers’ license when he was hired in 2007.

Seeing how well this worked, the Donks  want to impose the same regimen on everyone attempting to buy a gun. The no-brain solution is to simply refuse gun sales or possession to Democrats and Muslims.