He, Trump, is not ‘meddling’. It’s the Baltic states, Lithuania, Latvia, Estonia, who are asking Trump to stop the EU from making a deal to run more Russia pipes through their territory.
The Baltic states joined the EU long ago hoping to distance themselves from Russian influence. They feel the EU and Russia are cutting a deal and giving them no voice to object. If the US transports oil and gas to the Baltics, the Russian deal loses leverage.
That’s my take.
To me, that is an issue between the the Baltic states - Lithuania, Latvia, Estonia - the EU, and Russia. Don’t see where we should necessarily interfere except to possibly voice an opinion.