In addition, the background check system is something the president wants to improve, Sanders said, although "not necessarily" through a law that would require all gun sales and transactions to be universally checked.
There was no further information on what was discussed or promised, but Cox said in his tweet that Trump and Pence "support the Second Amendment, support strong due process and don't want gun control."
The reference to "due process" was an apparent effort to recast Trump's comments Wednesday in support of flouting the rights of gun owners who are flagged by their families or law enforcement.
Trump also voiced support for other measures opposed by the NRA, including raising the minimum age necessary to buy an assault rifle from 18 to 21, and said his administration was drafting an executive order that would ban rapid-fire gun bump stocks.
The NRA has called the bulk of those proposals "bad policy" that would not keep people safe.
There is pressure on Congress to act after the mass shooting at Marjory Stoneman Douglas High School last month in Parkland, Florida, that left 17 dead.
I had a great meeting tonight with @realDonaldTrump & @VP. We all want safe schools, mental health reform and to keep guns away from dangerous people. POTUS & VPOTUS support the Second Amendment, support strong due process and don’t want gun control. #NRA#MAGA