Philadelphia, PA-Based Comcast 4Q 2017 Net Income Was a Staggering $15.035 Bil, Up an Off-the-Charts 522%, or Up a Spectacular $12.618 Bil From Its 4Q 2016 Net Income of $2.417 Bil ...................................................................................... The Trump Tax Bill, Which Increased Comcast's 4Q 2017 Earnings By an Off-the-Charts $12.679 Bil, Accounted For the Entire 4Q 2017 Total Earnings Increase of Comcast of $12.618 Bil ..................................................................................... The Predominate Trump Tax Bill Component Increasing Comcast’s 4Q 2017 Earnings By $12.679 Bil Was the Massive Forgiveness of Existing Comcast Tax Debt, Which Was Funded Completely By US Taxpayers.