The Left is focusing on the 6 states that have no gun rights provision in their state constituions: New York (Cuomo), California (their entire Commie state legislature), New Jersey (the over-eager Dem legislators), Iowa (Muhlbauer & Grassley), Maryland (Commieville) & Minnesota.
This is probably to create a stampede among the other states which DO have gun rights provisions.
So what? 2A is prima facie self-binding on the States as well as the federal government, and is bound to the States by 14A as well, very expressly.
I should think they're playing to Democratic voters more than trying out con-law dodges to get around 2A. They will not succeed at that.