Here is more:
There are many economists who might agree with Biden, the presumptive Democratic presidential nominee, that the tax cuts have not generated much, if any, economic growth, but most conservative think tanks, including the Heritage Foundation, are not among them.
Biden’s campaign cited three articles that it says came from conservative institutions: two from the American Enterprise Institute and one from the Tax Foundation. None of them support Biden’s claim, though.
As for Biden’s specific claim that “even places like the Heritage Foundation said that [TCJA] didn’t grow the economy,” the Biden campaign did not get back to us with backup for that. But the Heritage Foundation, a conservative think tank, says that’s false.
Here is a recent Think Tank Watch piece on the think tankers that are advising Joe Biden.