President Joe Biden told reporters Sunday he would not intervene in negotiations. The strike could cost the U.S. economy $3.8 billion to $4.5 billion per day, with some of that recovered over time after normal operations resume, according to the Associated Press.

About 45,000 dockworkers at ports from Maine to Texas are on strike in a labor action that could impact the country’s supply chain—and potentially the election. Tens of thousands of dockworkers at ports from Maine to Texas went on strike Tuesday after the contract between the International Longshoremen’s Association and the United States Maritime Alliance expired without a new agreement in place.