Politicians like Senator Manchin said that they will not take away guns "from legal gun owners". This sounds like increased restrictions to determine who are the legal owners and who are those that they want to take the guns away from like the Florida shooter. Manchin said that no one should be able to walk up to a gun show booth and walk away without questions asked.
https://www.cbsnews.com/news/sen-joe-manchin-its-not-gun-control-its-gun-sense/
The murderer in Florida was NOT an illegal gun owner. He was a legal gun owner. He passed background checks to purchase his firearms legally. As have virtually all the "mass public murder" killers except for a couple that stole the guns they used.
Manchin is borrowing the term "gun sense" from Bloomberg's astroturf "Moms Demand Action for Gun Sense in America". Apparently Manchin, or someone in the propaganda machine, has decided that the phrase "commonsense gun safety regulations" is no longer effective. "Moms Demand" always claims "we are not against guns", but they clearly
are against anyone anywhere at any time possessing guns. Other than that...
Note Manchin also says "changing the loopholes of
commercial sales of guns is
a good first step". There are no "loopholes of commercial gun sales". Commercial gun sales are already strictly regulated, in detail, by existing laws. His bill extends those rules to
private gun sales, such as if you want to sell a gun to your cousin or neighbor, you would both have to go to an FFL and pay to go through the background check (yeah, doesn't apply to Hawaii where the fascists have already instituted registration, which is the next necessary step in order to keep track of all gun "transfers"). Then Manchin uses the "good first step" to characterize such an expansion of government control, without saying what the succeeding "steps" would be. We all know what those steps would be. Look at California, New Jersey, New York, Hawaii, Rhode Island, Connecticut, and Massachusetts for examples of how the slippery slope begins. We all know how it ends.

Edit: typo fixed