Have you tried putting grafite in the door latch or squirting W-D 40?

Remove the casing -- maybe just on the lock side. Cut nails/shims to relieve the pressure.

I got the casing to move a bit using a putty knife jammed between the casing and door and hitting a hammer on a strip of wood against the putty knife. But I need to try something with a bit more force.

I think the hinge pins are upside down. I have wooden interior doors that don’t close in summer, they get stuck like that.

I'll start by taking trim and casing off. The door worked for 30 years before it suddenly jammed shut. Something happened when an extremely heavily loaded vehicle or something that felt like a column of tanks moved down the street. Or maybe an earthquake finally hit Minneapolis...

Is the door undercut enough at the bottom to get a tool slid under? I'd try to rig something that would slip under, grab the back of the door and possibly hammer so as to pry from the bottom. Or wait till winter.

"I think the hinge pins are upside down."

Nope.

Goodness, no. You don't have to remove any casing. And certainly a truck driving down the street didn't make the door tighter. Even if you had an earthquake and the frame is now off-kilter, it is just a matter of the door is being held in the opening via friction, and you have not yet applied enough force to overcome that friction. Since the overly tight areas are certainly not uniform around the perimeter, you need to figure out which of the 3 sides is tight, and pry the door with a flat bar or stiff putty knife (which may include the open bottom 4 fourth side) to alleviate enough friction. Start by reinstalling the pins, I think you will have better luck.

BTW the tightness is caused by expansion of the wood due to humidity.

It's jammed in metal to metal at the hinges and latch. And certainly yes, a huge piece of heavy equipment was moved down the street and it did shake the hell out of my house. Just like a minor earthquake. 20 years of settling accelerated into one day. It's actually the beginning of winter here and the humidity is as low as it has been in months.

Have you put a pry bar between the door and the floor to try to lift the door itself up a bit, and then have someone else try to open the door.