MOSCOW (AP) — U.S. President Donald Trump and Russian President Vladimir Putin said they will speak by phone Thursday, their sixth publicly disclosed chat since Trump returned to the White House this year. Trump said in a social media post the call will take place at 10 a.m. EDT. Neither leader offered any immediate details on the topic.

Donald Trump has threatened Russia with “very severe tariffs​” should it fail to reach a cease-fire deal with Ukraine within 50 days, signaling a hardened U.S. stance as the war enters a volatile new phase.

The call between Trump and Putin comes just one day after Washington indirectly aided Putin’s war effort against Ukraine by suspending some shipments of air defense missiles, artillery shells and other weapons as part of what Pentagon officials have described as a pause of arms shipments globally while the U.S. replenishes its own stockpiles.

Trump agrees to sell billions in US arms to NATO countries including Germany, Finland and Denmark and others for quick distribution to Ukraine, following his ultimatum to Putin on peace talks.

But his frustration with Putin has grown. Last week, the president said the United States was taking “a lot of bullshit” from Putin. Today, he authorized a significant shipment of U.S. defensive weapons to Ukraine via NATO and threatened Russia with new tariffs if the war does not end in 50 days.

I go home, I tell the First Lady, ‘You know, I spoke to Vladimir today, we had a wonderful conversation’,” Trump told reporters. “She said, ‘Oh really? Another city was just hit’.”

U.S. President Donald Trump repeatedly said during his campaign he would be able to end the war between Russia and Ukraine “in 24 hours” upon taking office.

US President Donald Trump is trying again to end the war in Ukraine – not by targeting Russia, but by hitting the countries that buy Russia’s oil.

President Trump's tone has shifted both towards Putin and regarding the continuation of U.S. military support for Ukraine.