From a review of SEC filings and Google Finance, there were 17 Iowa Companies with stock market caps of above $100 mil sometime during 2020 and which reported Pretax Income (Loss) From Continuing Operations in their annual financial statement earnings information filed with the SEC for each of the most recent twelve years (Fiscal Years from 2008-2019).
The table below shows the Pretax Income (Loss) From Continuing Operations for each of these 17 excellent Iowa Companies for fiscal year end 2019, the last year of the Donald Trump/Mike Pence's first three full years in office so far, for fiscal year end 2016, the year before the start of the Donald Trump/Mike Pence Administration as well as also the last year of the Barack Obama/Joe Biden Administration, and for fiscal year end 2008, the year before the start of the Barack Obama/Joe Biden Administration.