U.S. oil prices already jumped last week, which could cause prices at the pump to rise about 20 cents a gallon in the coming weeks, according to one estimate.

Oil prices continued climbing Sunday after Israel and Iran traded blows against their respective energy facilities, threatening to expand the impact of the conflict in

Investors were on edge ahead of markets reopening late on Sunday, gripped by anxiety over nationwide protests against President Donald Trump and the escalating threat of a sweeping conflict in the Middle East.