Perspective: Russia's public mockery of Trump’s negotiating credibility comes as peace talks are stepping up.

The Kremlin says it regrets the expiration of the last remaining nuclear arms pact between Russia and the United States, while President Donald Trump declared he was against keeping its limits and wants a better deal.

President Donald Trump wants a new nuclear arms treaty with Russia and China instead of extending the expired New START nuclear arms treaty.

President Donald Trump boasted Friday about a secret US "discombobulator" weapon that can block Russian and Chinese defense systems, as he met the elite troops who captured Venezuelan leader Nicolas Maduro.

Russia's top diplomat says that Moscow will observe the limits of the last nuclear arms pact with the United States that expired last week as long as it sees that Washington does the same.

Donald Trump has called for a new, “modernised” nuclear arms control treaty between Washington and Moscow, instead of extending the expired New Start agreement.

The president's lies have gone nuclear.

The president said he will continue sending Ukraine aid if he can secure a rare earths deal, as if he does not, "Putin would say he won."