Trump hopes Putin seeks peace in Ukraine but warns of a ‘rough situation’ if not, hinting at strained diplomacy and security challenges ahead.

Rubio, who is also Trump's national security adviser, said he did not believe issuing new sanctions on Russia would force Putin to accept a ceasefire.

Hurtling toward talks between Zelenskyy and Putin, the days of slow-as-you-go diplomacy are clearly over in the age of Trump.