All the big railroads are unionized, per the Railway Labor Act of c.1926.

Short lines often aren't unionized. Some of the "regionals" are, others aren't.

I don't think the Florida East Coast is union -- they had a very bitter strike in the early 1960's that drove the unions out. They may still be "out" to this day.

In summary... if you're going to run the trains, you're probably gonna have to join the union.

Having said that, the operating jobs on the big RR's aren't like they once were. It used to be a much better place to work. Not so much any more. Truth is, the railroad unions have never been noted for "being on the strong side"...

Chuck Callesto
@ChuckCallesto
JUST IN: ⚠️ Lloyd Austin says US troops that are constructing Gaza aid pier can RETURN FIRE if attacked by Hamas..

BIDEN IS LEADING AMERICA DIRECTLY TO WW 3..

Defense Secretary Lloyd Austin told House lawmakers Tuesday that US forces helping to construct a floating humanitarian pier along the Gaza Strip’s coast may return fire if attacked from the Hamas-run Palestinian enclave — causing an uproar among both Democrats and Republicans.
5:55 PM · Apr 30, 2024

Gee, that's great. Unfortunately, few of our military are permitted to walk around with loaded weapons anymore.

As profit margins shrink daily, stores have to do what they can to survive.  This may have ripple effect on other chains... and not a good effect.  Private label products are becoming more popular as consumers feel their buying power shrinking. 

If biden can "grant" it, Mr. Trump can revoke it.