Transcript for Tensions high for Trump at NATO summit
E turn to presidentrump at that high-stakes summit in Brussels and Terry Moran is E in Brussels with the very latest. Goorning, Terry. Reporter: Good morning, robin. This nato summit is sure off T a rocky start. You know, American presidents R decades havead plenty problems with European lies but judgi from this morning president trump Eady taking that to hole N level. It was just a breakfastting with nato leadership but the ee got cold predent trump erupted to reporters and came out swinging at a major U. Ally. Germany isally controlled by Russia. Eporter: Thedent hurling a stinging cque there of Germany's recent $12 billion gas pipeline deal with Russia. A country nato calls the grea threat to the alliance. I think it'sery sad when Germany makes a massive oil and gas deal wh Russia where you're supposed toe guarding against Russia andma goes out and pays billions an ions of dollars a yea to Russia. Rr: Top U.S. And nato officials sat theresquirming. Despite these difrences we have always been able to unite around protect and defend each other because we understand re stronger together than apart. Reporter: But president trump wasn't buying af it Germany as far as'm concerned is captive to ruscause it's getting so much its energy ssia. So we're supposed to protect Germany but they're getting their energy from Russia. Explainthat. And it can't be ne Reporr: It loo like it'll be a L summit. Two more days th president trump like previous U.S presidents demanding thes pay more ofnato's costs but doing it his way. WHE left the white house Tuesday hended lot friendlier WHE talking about his one-on-one meeting next week with Russian president Vladimir tin. So I H nato, I H the uk which I in somewhat turmoilnd I have Putin. Frankly, Putin may be the easiest of them all. Wo think? Repr: Well, the queen a lot of Europeans are ag does president trump want to reform or blow it up? Anwhile, first lady Melania trump isompanyinghe esident on this trip. Herst overseas tripin Asia last year recovering well om surgery, it looks like, beca she's G several event, a ncert, a fashion event and she'll be oting her be best iative. Robin. All right, iterry, thanks so much.
This transcript has been automatically generated and may not be 100% accurate.