Buffet is heavily invested in insurance. Don't the super rich use this to protect their businesses from the death tax since life insurance payouts aren't taxed? Since the keystone pipeline was killed , the oil now must be shipped by one of the railroads Buffet has a controlling interest in. Warren also owes a fortune to the IRS for back taxes.
If I were a cynic and didn't believe in Warren's basic decency, I'd think these items MIGHT be influencing his decision to become a shill for this regime.