President Donald Trump speaks at the "Inaugural Pennsylvania Energy and Innovation Event" at Carnegie Mellon University on Tuesday in Pittsburgh. (AP Photo/Evan Vucci)

WASHINGTON (AP) — President Donald Trump on Tuesday downplayed 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.

Trump offered a more cautious tone on what to expect after he threatened Russia a day earlier with steep tariffs if President Vladimir Putin doesn’t act within 50 days to end the three-year conflict. He also on Monday announced plans to bolster Kyiv’s stockpile by selling American weapons to NATO allies who would in turn send arms to Ukraine.

Providing Ukraine with more long-range weaponry would give Kyiv the chance to strike further into Russian territory, a move that some in Ukraine and the U.S. have said could help push Putin toward negotiations to end the fighting.

Asked if he intended to supply Ukraine with weapons that could reach deeper into Russian territory, Trump replied, “We’re not looking to do that.” He made the remarks to reporters before departing the White House for an energy investment event in Pittsburgh.

While Trump’s threats of weapons, sanctions and tariffs mark the most substantive pressure he’s placed on Putin since returning to office nearly six months ago, some lawmakers said they remain concerned that the administration, with the 50-day deadline, is giving Putin time to grab even more Ukrainian territory.

Sens. Thom Tillis, a Republican from North Carolina, and Jeanne Shaheen, a Democrat from New Hampshire, said waiting 50 days before imposing sanctions on Russia would give Putin more time to gain an advantage in the war.

“The 50-day delay worries me that Putin would try to use the 50 days to win the war, or to be better positioned to negotiate a peace agreement after having murdered and potentially collected more ground,” said Tillis, who recently announced he won’t run for reelection.

Tillis and Shaheen lead the Senate NATO Observer Group, which facilitates work between Congress and NATO, and met Tuesday with NATO Secretary General Mark Rutte on Capitol Hill.

Trump himself scoffed at the idea that 50 days is giving Putin too much time. The president suggested he may act more quickly if he does not see signs that Putin is taking steps toward ending the conflict.

“I don’t think 50 days is very long and it could be shorter than that,” he said.