Trump slammed the Democrats and the media on Saturday, tweeting that they started what he termed "the Ukraine Witch Hunt" and tried to "protect Sleepy Joe Biden."
Trump said he was trying to clinch an immigration deal, but that his Democratic rivals were unhelpful.
Trudeau, referring to Canada's sacrifices in both world wars, stressed that the fight against the virus "is not a war," but "that doesn't make this fight any less destructive."
Tsinghua Unigroup is championing China's efforts to develop homegrown chips, as part of the country's broad push to reduce reliance on foreign technology. The Beijing-based company became the largest chip firm in China after it acquired Spreadtrum Communications Inc, the world's third-largest mobile phone chipmaker, and RDA Microelectronics Inc, the fourth-largest, in 2013.
Trump has been seeking to place the issue of immigration front and center in the elections, repeatedly warning against a caravan of Central American migrants making its way to the US-Mexico border.
Trump was blasted over the weekend for what critics said was dragging his feet on condemning white hate groups such as the KKK and Neo Nazis, although on Monday Trump spoke from the White House on the issue, calling racism "evil" and lambasting Neo Nazis and KKK members as "criminals and thugs."
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Trump has said he is America's most pro-Israel president and pointed to his decisions to recognize Jerusalem as the capital, move the American embassy to the holy city from Tel Aviv, and recognize Israeli sovereignty over the Golan Heights.
Trump's initial comments on the attack were succinct, declaring on social media that "Iran made a very big mistake!"
Trump urged the Democrats to "redo and send back in proper form!".
Trucks are seen at a parking lot of Manbang Group in Guiyang, capital of Guizhou province. [Photo/Xinhua]