Trump, who is expected to make an appearance on each of the four nights at the RNC, will deliver an acceptance speech on Thursday night from the White House South Lawn.
Trump tweeted: "Good for the consumer, gasoline prices coming down! Saudi Arabia and Russia are arguing over the price and flow of oil. That, and the Fake News, is the reason for the market drop!"
Trump took to Twitter just before 1 am on Friday with tweets that called the protesters in Minneapolis thugs and said: "When the looting starts, the shooting starts."
Trump, announcing Mattis' departure on Twitter, said he would nominate a successor soon.
Trump's latest effort to crack down on immigration follows a measure in April to temporarily suspend immigration to the US, which he said was aimed at protecting US jobs affected by the coronavirus pandemic.
Trump's defense argued neither charge constituted a crime or impeachable offense, that he was within his rights as president to make decisions about foreign policy and what information to give Congress, and that the House pursued a flawed and one-sided process before impeaching him on Dec 18.
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Trump also wrote that negotiations will "start now!" on an immigration measure that he and Democrats have been battling over for months.
Tsonyi, which sits at an average attitude of 5,000 meters above sea level, covers about 120,000 square kilometers 800 kilometers northwest of Lhasa, the regional capital, accounting for one-12th of the region's area.
Troy Williams with the LGBT-advocacy group Equality Utah called the announcement a big step forward.
Trump and his trade hawks hope that China and other US trade partners will blink first because of the escalation given the US economic might and its oversized clout in the global economic and financial system.