This is politics so any thing is possible and don't say Russia is not capable of sending soldiers to Greenland because if Putin see what he can benefits from the Ireland he can maneuver and send his troops there, that trump is talking about Greenland means that he has interest in that place and any where that the United States of America is interested in there is something that they plan to get from such place
First, what has Ireland to do with any of this?
Ireland is protected by the UK treaty defense, invading Ireland means war with the entire UK.
Second, they can't send them here, if you say it's possible, show me how they would do it!!!
The Russian navy lacks the ships for this, the Russian air force lacks the planes for this, they would need an expeditionary force that would cross the water of the second and fourth most powerful fleet in this world, Russia has no blue water capabilites anymore, how would this plan be even theoretically be possible.
With what stuff?