That's not how traffic laws work.

It's a campaign bus, not voters at a polling station. Drivers supporting another party are absolutely allowed to drive next to them.

Texas law is quite open to interpretation. Reckless driving is defined as "a person commits an offense if the person drives a vehicle in wilful or wanton disregard for the safety of persons or property." [1]

Driving at that distance is wanton disregard for the safety of the persons in the bus, but that's open to interpretation of the officer at the scene.

[1] https://codes.findlaw.com/tx/transportation-code/transp-sect...

I'm just serving your point by quibbling about the law. The driver's intent is quite clear. Intimidating people because you disagree with them is unacceptable behavior. In this case, I suspect it's also illegal.

The suv merging into the truck also is showing wanton disregard for the safety of persons or property too

I don't know the local laws, but isn't there a minimal distance between cars in the runway? The truck was too close to the bus.

Tailgating is a thing, but so is not merging when unsafe to merge as well as splitting lanes is a thing you should not do (motorcycles excepted in some states).

I agree. It would be nice to see a 3D reconstruction of the whole event from above.

>motorcycles excepted in some state

Only california, fwiw.