Presidential candidate Sen. Elizabeth Warren likes to tell everyone that she “has a plan” for virtually every issue facing the country. Most of her plans (tax the rich schemes to pay for massive new government spending) are untested campaign proposals that have little chance of going anywhere in Congress.

But one of her latest plans would restrict corporate takeovers and restructurings. It’s similar to a plan that caused the largest stock market crash in our history the last time it was considered by Congress.