Joanna Kakisis

In a post on social media, Zelensky says Trump's son-in-law, Jared Kushner, and special envoy Steve Witkoff were also on the call.

Zelensky says he thanked them for their efforts and that they talked about how to handle sticking points in negotiations.

He says he proposed a series of steps to resolve, quote, complex and sensitive issues, though he does not detail those steps.

Zelensky says Trump endorsed the idea.

The issue of territory remains the most difficult.

The Kremlin wants Ukraine to hand over land in the east that is not occupied by Russia.

Ukraine has refused and is pushing for binding security guarantees so Russia does not invade again.

Joanna Kekises, NPR News, Kyiv.

Rubio praised Orban's success and said it's also the Trump administration's success.

The authoritarian leader has run Hungary for the last 14 years.

He is trailing in public opinion polls.

Ukrainian President Volodymyr Zelensky said this weekend that Orban is, quote, more interested in growing his belly than protecting Europe from Russia.

Through an interpreter, Orban said Zelensky and Ukraine want to involve themselves in Hungary's election.

Orban opposes European aid to Ukraine and the country's bid to join the European Union.

Joanna Kakisis, NPR News.

Attack drones flew over neighborhoods in Ukraine's capital, Kyiv, as air defense units tried to shoot them down.

Russia has repeatedly struck Ukraine's energy grid during the coldest winter since the full-scale invasion nearly four years ago.

Kyiv Mayor Vitaly Klitschko wrote on social media that half of the city's apartment buildings are once again without heat.

Klitschko told NPR on Thursday that it's a challenge to repair the capital's massive heating system.

He said Ukraine needs more air defense supplies to protect its energy grid.