Yellen says Trump can't fly the copter

The Hill: Federal Reserve Chairwoman Janet Yellen blasted Donald Trump’s suggestion that he would renegotiate on the nation’s debt if elected president, warning of “very severe” consequences.
 Testifying before Congress, Yellen was asked indirectly by Sen. Bob Menendez (D-N.J.) what she made of Trump’s claims that the U.S. could load up on debt and “make a deal” with creditors if the economy soured.
The presumptive Republican presidential nominee was not mentioned by name in the exchange, but Menendez asked Yellen specifically what would happen if a U.S. president pushed creditors to accept less than full payment on U.S. debt obligations. Yellen launched a strong defense of the sterling reputation of U.S. Treasury bonds in global markets and made clear she believes the U.S. should make full payment on its debt a top priority.
 “U.S. Treasury securities are the safest and most liquid benchmark security in the global financial system,” she told lawmakers. “They play a critical role in our financial markets, and the consequences of such a default, while they’re uncertain, I think there can be no doubt that it would be in the long run harmful to U.S. interests. At a minimum, it would result in much higher borrowing costs.”

Why not Trump is no worse than Nixon.