Yellen Calls Invoking 14th Amendment to Raise Debt Limit 'Legally Questionable' The New York TimesAs lawmakers warn of a Social Security 'shutdown,' here's how the debt ceiling may affect benefits CNBCWhat Happens If the US Treasury Runs Out of Cash? Here Are Yellen's Options BloombergJanet Yellen says US default would trigger a global economic downturn CNNYellen says ‘different system’ needed to end standoffs on debt ceiling The HillView Full Coverage on Google News