Perhaps it should be spelled out a little better.
The Canadian National Railway ( a company ) owns a lot of rail in the USA as well as in Canada and Mexico. BFD.
This same CNR is publically owned and traded in the USA and Canada. BFD.
This whole flip out is just the usual suspects having a conniption fit over some imaginary conspiracy to force the USA, Mexico and Canada into some false political construct in order to usurp the sovereignty of all three and replace it with ... Something EEEEEVIL!
This same nonsense has been going on for years, but was usually restricted to shadowy religious cults and anti-semites. Joy of joys, paranoia has gone mainstream globally.
Everything I posted above saying C*N*R was meant to be C*P*R. However, most of what I posted about the one applies to the other as well.