Shipping container operations at the Port of Wilmington in North Carolina have been halted due to tens of thousands of dockworkers going on strike up and down the East Coast. Why it matters: A work stoppage that lasts more than a few days will snarl supply chains, raising the prospect of higher prices and shortages of everything from auto parts to bananas as the U.S. heads into the holidays – and a presidential election, Axios’ Emily Peck writes.