Donald Trump is a big impact on Americans' lives, especially when some of the most vital stuff we buy has been hit the hardest. Gas prices alone rose 9.1 percent in September, accounting for almost half of the overall price increase. Fuel oil, what most people use to heat their houses, also shot up 15.3 percent. That's the biggest increase since March, shortly after the beginning of the Iran war, which is still very much unresolved.