Article continues below advertisementDonald Trump is being mocked online for seemingly using a DoorDasher to promote his "no tax on tips" initiative. The president, 79, was filmed as he met a woman sporting a "DoorDash Grandma" T-shirt outside the Oval Office on Monday, April 13, to collect a McDonald's order.The Republican leader could be seen holding two bags from one of his favorite fast-food chains as he asked the lady, identified as Sharon Simmons, if she wanted to do a news conference with him.