The impact of House Ways and Means Chairman Kevin Brady's amendment to revise one of the GOP tax bill's offshore provisions emerged late Tuesday — an estimated $74 billion revenue hole, which is sending tax writers scrambling to find additional revenue.

They may pursue a risky strategy to make up the shortfall: repealing the 2010 Affordable Care Act's individual mandate. House Republicans are edging closer to accepting President Donald Trump's suggestion to combine their tax legislation with a repeal of the mandate that all individuals purchase health insurance, according to a person who's helping to draft the tax bill.

While the move would give House tax writers an estimated $416 billion in sorely needed offsets for the deep rate cuts they want, it risks alienating GOP senators, who voted down a measure that would have repealed the so-called individual mandate last summer.