cops can now seize your pistols on a routine traffic stop if need be and not return them until a background check has been performed - even if you have a concealed carry permit.
I googled the hell out of this, and only found that possibility on Alex Jones' Infowars website.
Here's the White House summary of this particular executive order:
5. Propose rulemaking to give law enforcement the ability to run a full background check on an individual before returning a seized gun.
If this had read "give law enforcement the ability to seize guns to run a full background check on an individual," then I'd be disturbed.
Otherwise, I think "cops can now seize your pistols on a routine traffic stop" is quite a reach.