Now if Germany had pulled a Zimmermann Telegram only to the US and offered it Canada and some British territory in the pacific or some other things to that effect in exchange for joining the CP and waging war on the British what do you believe the effects would be?
It would just be ignored.
I honestly do not feel that the USA would be at all interested in this. Relations between the US and Britain appear quite good at this time. There are no real grievances at this time. Also Germany would not likely have been in a position to award territory from Canada to the US, as in itself it appear to not have a chance to invade Britain.
If America got involved on the German side it would not needed German permission to annex canada. Also it took three years of provocation to turn the USA against Germany, what was the case for war against Britain?
None, it's a spin on the whole zimmer note. Germany is desperate for help and is trying to use old and now nonexistent grievances to get the US to join.
Now lets assume that it's 1910 and Germany does this.