Trump suggests Russia may have had knowledge of Syria chemical attack

Trump also said U.S.-Russia relations may be at an "all-time low."

"I think it's certainly possible. I think it's probably unlikely, and I know they are doing investigations into that right now," said Trump. "I would like to think that they didn't know, but certainly they could have. They were there. So we'll find out. General Mattis is looking into it with the entire Pentagon group that does that kind of work."

"Right now we're not getting along with Russia at all. We may be at an all-time low in terms of relationship with Russia," said Trump. "This has built for a long period of time, but we'll see what happens. Putin is the leader of Russia. Russia is a strong country. We're a very, very strong country. We're going to see how that all works out."

Tillerson said much of the same following a joint press conference with Lavrov, attributing the two countries' problems to a lack of trust, but wouldn't go as far as Trump when it came to speculating about Russian awareness of the chemical attack.

"With respect to Russia's complicity or knowledge of the chemical weapons attack, we have no firm information to indicate that there was any involvement by Russian forces into this attack," said Tillerson

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