Trump also said the US side has been in touch with the DPRK.
Trump's earlier planned visit to Britain, traditionally the United States' closest ally in Europe, was canceled in January.
Trump blamed NAFTA for millions of job losses in the United States as companies moved south to employ cheaper Mexican labor. Trump is running for re-election in 2020, and his 'America First' policy will likely feature prominently in the campaign.
Trump fired off a series of tweets pushing back against the notion that he doesn't have a strategy to end what became the longest government shutdown in US history when it entered its 22nd day on Saturday. "Elections have consequences!" he declared, meaning the 2016 election in which "I promised safety and security" and, as part of that, a border wall.
Trump pushes US universities to keep reopening despite COVID-19 cluster outbreaks - World - Chinadaily.com.cn
Trump last week threatened to seal the border this week if Mexico did not immediately halt all illegal immigration into the US, a move would have enormous economic consequences on both sides of the border.
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TuSimple, founded in 2015, currently operates self-driving trucks out of Tucson, Arizona. It is one of a number of start-ups developing technology aimed at making long-haul trucking cheaper and more efficient.
TuSimple, founded in 2015 and based in Beijing, aims to improve drivers' working conditions to reduce truck accidents on highways by up to 75 percent. Its ecosystem also decreases fuel waste by as much as 7 percent, according to the company.
Trump's action against the South American countries on Monday may be part of the continuing trade dispute between the US and China.
Trump is right that the USPS is in financial trouble. The service?reported a decrease of .8 billion in revenue in 2017 compared to the previous year, a drop driven largely by a decline in regular mail, like letters and postcards. But package delivery is actually a rare growth area for the service. Package volumes grew by 11.4 percent last year,?according to USPS?and documents show that package revenue?contributed a net total of more than .1 billion?to the agency’s bottom line during fiscal year 2017. The USPS is on an unsustainable financial path and must be restructured to prevent a taxpayer-funded bailout.