President Trump suggested today, in a meeting with the President of Poland in the Oval Office, that Poland has always wanted a larger presence of US troops in their country and will send them more if they want it:

This is clearly a message to Russia because Putin hates the fact that America is so aligned with Poland, and adding more troops there would not make him happy.

Honestly, I think Trump should also make plans to put a second missile defense base in Poland if he really wants to pressure Putin to end the war in Ukraine.