Truck fleets have been involved in autonomous driving tests for about six years in Europe, the US and Japan.
Trump and his fellow Republicans initially took pains to be careful in their treatment of Kavanaugh's accuser, a psychology professor who had kept the experience a secret for decades.
Trump also thanked Kim via Twitter for returning the remains of fallen US soldiers from the Korean War.
Tripp was fired from her Pentagon job on Clinton's final day in office in January 2001, and later settled with her husband in Middleburg, Virginia, outside Washington.
Trump and Republican senatorial candidates Tom Cotton of Arkansas and Bill Hagerty of Tennessee accounted for 93 percent of the tweets that use stigmatizing rhetoric.
Trump held a "Make America Great Again" rally in the western coastal city of Tampa, with thousands of supporters gathering outside of the Raymond James Stadium and First lady Melania making her first joint campaign appearance of the year.
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Trump and his team have clearly been exploiting the public illiteracy on the issue, partly because US news media have not pointed out the fallacy each and every time Trump blames other nations for US trade deficits.
Trump was due to hold a one-on-one meeting with Merkel later on Wednesday and will meet Russian President Vladimir Putin in Helsinki, Finland, on Monday.
Trump, Biden give contrasting messages on COVID-19 in Florida rallies - World - Chinadaily.com.cn
Trump met with Kim first in Singapore last year on June 12, reaching several points of general consensus that have led to the improvement of the US-DPRK relations. However, differences between the two sides remain over key issues including the scale of denuclearization, US sanctions on the DPRK and whether to issue a war-ending declaration.