The economic events that spurred inflation occurred after Biden through his actions increased the cost of fuel and pumped too much stimulus into the economy. By your own measure if Trump enacted tax cuts Jan 1st, 2018 we should've seen a big spike in inflation a year to 18 months later. Inflation actually went down in 2019 and 2020.We didn't see inflation in 2008-12 because of high unemployment numbers. Demand was suppressed because of flat wage growth, one of the greatest drivers of inflation. Economist agree that inflation is a lagging measure which takes 12 to 18 months after an economic event takes place. The current inflation cycle began in the spring of 2021, meaning the economic event that spurred inflation occurred in late 19 or early 20.