As of this moment, I can legally carry in every state in America except California, Connecticut, DC, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island and South Carolina.
So basically, I can't carry in a handful of uber liberal states in the Northeast, and the two most liberal states on the west coast, and two outliers, Illinois and South Carolina.
Technically I could apply for a CT non-resident permit, but I don't see myself visiting anyway. Not to mention the CT permit application has a specific question about your arrest record and I have been arrested before, though it wasn't for a violent crime or anything even remotely serious.
South Carolina surprises me, and I could see reciprocity being expanded there in the future. Maryland and the Northeast states listed are basically lost causes. There are Two America's in this country now, and those states have squeezed out their gun culture and with it many freedom loving folks to where they are far past the tipping point. There's just not enough of a pro-gun & pro-liberty voting block in those states to tip the balance back towards individual liberty. Gun laws in those states have gotten progressively worse and with that, gun owners flee. It's a slow process, but through attrition, it becomes that much harder for the remaining folks to fight the petty tyrants. Oh, and the tyrants know this.
I don't know what it'd take to get reciprocity or even any form of shall issue carry in the states listed (or even shall issue in DE) If anything the Two Americas is only going to get worse, with red states getting redder and blue states getting bluer. I'm uncertain what the solution to this is and I'm not entirely convinced there is any good solution. For now though, I'm pretty happy that by and large, the number of states where I can legally carry my gun has increased.