The White House said Wednesday it’s “watching very closely” protesters blocking a key bridge that connects the United States to Canada, asserting that it risks disrupting auto production, agricultural exports, and more. Canadian protesters led by truckers who have amassed on the bridge are demonstrating to end COVID-19 mandates, namely vaccine requirements for truck drivers who cross into the United States. A convoy of truckers and other protesters have remained in Ottawa for nearly two weeks. “The Ambassador Bridge is Canada’s busiest link to the United States and accounts for about 25 percent of trade between the two countries,” White House press secretary Jen Psaki told reporters on Wednesday, “and so the blockade poses a risk to supply chains for the auto industry because the bridge is a key conduit for motor vehicles components and parts.” Psaki said that the White House is communicating with Michigan Gov. Gretchen Whitmer’s office …