President Donald Trump, appearing fed up, accused the Russian President Vladimir Putin of spouting “bullshit” and said he was “very strongly” considering supporting a punishing sanctions bill to bring Russia to heel.

The legislation, which has broad bipartisan support, would impose high tariffs on countries that import Russian energy and implement secondary sanctions on foreign firms that support Russian energy production.

While the legislation has for some time had the votes to pass in both chambers of Congress, Republican leadership has not brought it to the floor, waiting for a signal from Trump.

“I’m looking at. It’s an optional bill,” Trump said during a Tuesday Cabinet meeting. “It’s totally at my option. They pass it totally at my option, and to terminate totally at my option. And I’m looking at it very strongly.”

Trump hastold allies privately that he doesn’t believe sanctions would be effective in deterring Putin; and, during a meeting last month with Germany’s chancellor, he criticized the legislation as “a harsh bill, very harsh.” But his comments during the Cabinet meeting signaled that he could be changing his mind, or at the very least encouraging the Senate to send the bill to his desk while stopping short of committing to signing it into law — a means, said one person familiar with the administration’s thinking and granted anonymity to discuss it, of increasing the president’s options and leverage over Putin.

Trump’s comments are the latest signal of a broadening rift between him and Putin, who the president once hoped would help him quickly end the war in Ukraine. Trump has noticeably cooled toward Putin since the Russian leader refused to attend a summit in Istanbul that the U.S. organized in an effort to wind down hostilities in Ukraine. Putin, instead, has intensified attacks on Kyiv and other population centers.

“I don’t know what the hell happened to Putin,” Trump said in May, before posting on social media, “He has gone absolutely CRAZY.”

At last month’s NATO summit in the Netherlands, Trump was chummy with allies, supportive of the alliance and held a long meeting with Ukrainian President Volodymyr Zelenskyy.

Trump reiterated Tuesday that he was “very unhappy” with Putin, with whom he spoke for more than an hour last Thursday.

“We get a lot of bullshit thrown at us by Putin, [if] you want to know the truth,” Trump said.

Trump’s remarks come less than 24 hours after he said that he intended to restart weapons shipments to Ukraine, which were halted last week following a Pentagon review that cited concerns about munitions shortages potentially impacting American military readiness.

Although the White House insisted that the review hadn’t come as a surprise to the president, Trump on Tuesday claimed not to know who at the Pentagon oversaw the review and decided to pause Ukraine aid.

“I don’t know,” he replied. “You tell me.”