Article continues below advertisementAs the U.S. war with Iran begins to ripple through global energy markets, Americans are seeing the effects where it often matters most: the gas pump. National average gasoline prices have climbed sharply in recent days, a trend President Donald Trump has dismissed as a temporary "glitch."Speaking to ABC News earlier this week, Trump characterized the rising costs as a short-term side effect of the conflict. "I think it's fine. It's a little glitch.