About the use of “over” in “He is going to hold America's infrastructure hostage over the investigation issue.”

Question

The seventh entry in the ODE defines the preposition over as:

On the subject of.

along with some synonyms:

in connection with, regarding, concerning, about.

Is this the meaning that over took within:

He is going to hold America's infrastructure hostage over the investigation issue.

Answer 1

Yes, it means "in connection with the investigation issue" or in this specific case "because of the investigation issue".