Trump selected Barrett to fill the seat vacated by the death of Justice Ruth Bader Ginsburg, a leading liberal voice on the country's highest court.
Trump also revealed that he's likely to meet with the top leader of the Democratic People's Republic of Korea (DPRK) "early next year."
Trump pulled the US out of the Trans-Pacific Partnership shortly after he occupied the White House in 2016.
Trump said recently that the United States will impose "tougher than ever" sanctions on Iran after the punitive actions against the country slated for November this year.
Trump later Sunday pushed the news media to divulge the whistleblower's identity, asserting that the person's accounting of events is incorrect. The whistleblower's complaint has been corroborated by people with firsthand knowledge of the events who have appeared on Capitol Hill.
Trump, who was meeting with world leaders at the United Nations on Tuesday, said the impending inquiry would be a "positive for me".
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Troops designated for the base in the Horn of Africa left for the facility, the first of its kind for the Chinese military, after a departure ceremony at a naval port in Zhanjiang, Guangdong province, the Navy said.
Trump also took aim at the nuclear deal reached between Iran and world powers of Britain, China, France, Russia and the United States plus Germany in July 2015, under which Iran agreed to limit its uranium-enrichment activities in return for the lifting of Western and international sanctions.
Trump's tweet drew a scolding from Sen. Ben Sasse, a Nebraska Republican who sits on the Senate Judiciary Committee.
Trump has already deployed Homeland Security agents to Portland, Oregon, on the grounds of protecting federal buildings from protesters, drawing intense criticism from local leaders who say the federal presence has only exacerbated tensions rather than promoted public safety.