Top White House economic adviser Larry Kudlow said on Sunday that he's "bullish" on the prospects of a U.S.-Chinese trade deal being finalized by April, but acknowledged that a final agreement is up to President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE.

"I think we’re making great progress," Kudlow said on "Fox News Sunday."

"Across the board, the deal has to be good for the United States, and for our workers, and our farmers and our manufacturing. It's got to be good. It's got to be fair and reciprocal and it's got to be enforceable."

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Kudlow said the two sides made "great headway" when Chinese representatives visited Washington two weeks ago, and that negotiators have remained in contact every day since then.

"I don’t want to predict, it’s up to the president and not to me, but I think the headway has been good," Kudlow said.

Pressed on whether Trump and Chinese President Xi Jinping will sign an agreement by the end of March or April, Kudlow said he would "play that from the optimistic side."

"I will take the over on that," he said.

"Over meaning?" anchor Chris Wallace asked.

"Over meaning good," Kudlow said. "Yes. Positive. Bullish."

Trump late last month announced a delay of a March 1 deadline to impose additional tariffs on Chinese goods, citing “substantial progress” in negotiations over a comprehensive deal.

Negotiators have been working for months to hammer out a complex deal that addresses trade, intellectual property theft and the criminalization of fentanyl shipment, among other areas.

Trump has repeatedly said he needs to meet with Xi before the two sides sign off on a final agreement.

Kudlow downplayed a report that Xi canceled plans to meet with Trump at Mar-a-Lago in Florida, saying Sunday that "you can’t cancel something that wasn’t scheduled."

The president has vowed since the 2016 presidential campaign to secure improved trade deals, and to rein in what he has called China’s unfair practices.

The two sides have been locked in an escalating trade war for months, levying billions of dollars in tit-for-tat duties on the other's products.