President Donald Trump is redoubling his efforts to end the war in Ukraine, announcing a second meeting with Russia's Vladimir Putin one day before sitting down with Ukraine's Volodymyr Zelenskyy at the White House.

Trump's announcement came shortly after finishing a call with Putin on Thursday. A date has not been set, but Trump said the meeting would take place in Budapest, Hungary.

As the push for a diplomatic breakthrough continues, Maria Snegovaya, a Senior Fellow for Russia and Eurasia at the Center for Strategic & International Studies in Washington D.C., said "achieving an immediate ceasefire in the near future is very unlikely."

"Putin's goals largely remain unchanged, and unless he is faced with real sticks, not just carrots, a real worsening of the domestic situation, perhaps really strong resilient response on the Ukrainian side, Putin is unlikely to change his posture," Snegovaya told The Associated Press.

Trump was already scheduled to meet Friday with Zelenskyy, who has been seeking weapons that would allow Ukrainian forces to strike deeper into Russian territory. Zelenskyy has argued such strikes would help compel Putin to take Trump’s calls for direct negotiations to end the war more seriously.

Friday's meeting with Trump and Zelenskyy will be their fourth face-to-face encounter this year. After their initial Oval Office conversation devolved into recriminations, they've forged a more amicable relationship.

Trump has said he's considering selling long-range Tomahawk missiles to Kyiv, something Putin has said could further damage relations between Moscow and Washington.

Although such a sale would be a splashy move, it could take years to provide the equipment and training necessary for Ukraine to use Tomahawks.

Waiting for Trump’s blessing is legislation in the Senate that would impose steep tariffs on countries that purchase Russia’s oil, gas, uranium and other exports in an attempt to cripple Moscow economically.

Though the president hasn’t formally endorsed it — and Republican leaders do not plan to move forward without his support — the White House has shown, behind the scenes, more interest in the bill in recent weeks. Senate Majority Leader John Thune on Thursday offered the most upbeat prospects yet for the bill, saying senators will consider it “in the next 30 days.”

Administration officials have gone through the legislation in depth, offering line edits and requesting technical changes, according to two officials with knowledge of the discussions between the White House and the Senate. That has been interpreted on Capitol Hill as a sign that Trump is getting more serious about the legislation, sponsored by close ally Sen. Lindsey Graham, R-S.C., along with Sen. Richard Blumenthal, D-Conn.

Thune said Graham will introduce a revised bill shortly. A White House official said the administration is working with lawmakers to make sure that “introduced bills advance the president’s foreign policy objectives and authorities.” The official, who was granted anonymity to discuss private deliberations, said any sanctions package needs to give the president “complete flexibility.”