President Donald Trump’s ultimatum to Russia to accept a peace deal in Ukraine within 50 days or face bruising sanctions has given the Kremlin extra time to pursue its summer offensive.

President Trump has effectively handed Vladimir Putin an extraordinary green light: 50 days to finish off his brutal summer offensive in Ukraine before facing any consequences.

The US president says he is "disappointed" in Putin and will be sending "top-of-the-line" weapons to Ukraine, via Nato.

President Donald Trump is downplaying the possibility of sending Ukraine long-range weapons as Kyiv awaits an injection of U.S. weaponry that it hopes will help it beat back an intensifying Russian air offensive.

Russia launched four missiles and 136 drones into Ukraine overnight into Monday morning, according to Ukraine's air force.

Dmitry Peskov, the spokesman for Russian President Vladimir Putin, described Trump's statement as "very serious" during his daily press briefing on Tuesday, July 15. Peskov said Putin would need time to analyze Trump's remarks, some of which were directed at him, and to decide whether to comment.

"We are very unhappy, I am, with Russia," President Trump said while in a meeting with NATO Secretary General Mark Rutte.

Trump also revealed that Putin had recently offered to assist in mediating between Israel and Iran during their brief June conflict — an offer he declined. “I said, ‘No, no, you help me get a settlement with you, with Russia,’” Trump recounted. “And I think we're going to be doing that too.”

Donald Trump’s remarks on Ukraine on Monday were far from the biggest announcement the US president could have made.

In exchange for David Slater's guilty plea in conspiring to transmit classified information about Russia's war with Ukraine on a foreign online dating platform, two other counts were dropped.