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GOP leader concedes earth might possibly not be flat, but says we'll have to wait 8 or 9 years to reach any conclusion 1/ washingtonpost.com/business/2019/…
No idea in economics has been as thoroughly tested – and as completely rejected – as the notion that tax cuts pay for themselves. The reason it has been tested so much is that Republicans keep insisting that it's true, and base policy on the claim 2/
Then, when it fails – which it has done again and again, from Bush to Trump, from DC to Kansas – they pretend not to notice, and do it all over again 3/
By the way, in terms of claims that the economy's performance somehow justifies the tax cut: here's CBO's estimate of the cyclically adjusted budget deficit, a measure of fiscal stimulus 4/ 
That's a lot of stimulus. Imagine what would have happened if a GOP Congress had allowed Obama to spend 2 percent of GDP -- $400 billion a year – on something actually useful, like infrastructure. Think of how much that would have juiced the economy 5/
Instead, we got a bit of a boost, which is already fading, with most of the lost revenue going to stock buybacks. But here's the thing: the next time Rs propose a big tax cut, they'll pretend none of this ever happened, and that cuts pay for themselves 6/
