President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE is reportedly growing frustrated because efforts with North Korea are not progressing as quickly as he would like.

The Washington Post reported Saturday that Trump has requested daily status updates on talks with North Korea and is eager for next steps on the end of the country's nuclear program.

But he’s been left frustrated as North Korean officials have canceled meetings with U.S. representatives, and failed to stay in communication, according to The Post.

North Korea has also reportedly stepped up its fuel production for nuclear missiles, despite committing to denuclearization.

The Post reported based on reports from half-dozen aides in the White House and State Department that Trump is privately fuming about negotiations.

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Trump has repeatedly touted his summit with North Korean leader earlier this year as a success.

He and Kim signed an agreement after the meeting, with the U.S. committing to unspecified security guarantees in exchange for the denuclearization of the Korean peninsula.

The country also promised to return the remains of U.S. soldiers killed during the Korean War. But North Korean officials told Secretary of State Mike Pompeo Michael (Mike) Richard PompeoTreasury sanctions individuals, groups tied to Russian malign influence activities Navalny released from hospital after suspected poisoning Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE during his trip to the country earlier this month that they had no specific plans in place for returning the remains, according to The Post.

Kim also reportedly declined to meet with Pompeo during the trip, despite a meeting being planned. The secretary of State later denied that he had planned on meeting with Kim.

“I’m in no real rush. I mean whatever it takes, it takes,” Trump said of negotiations with North Korea, in an interview with CBS this past week.