Bernie Sanders taps youthful enthusiasm in his rise

SIOUX CITY, Iowa (AP) — Bernie Sanders was halfway through his opening statement — a stern, 45-minute lecture on domestic policy leavened with a dash of political pep talk — when he realized the crowd had missed one of his rare attempts at humor.
"That was a joke!" he bellowed. Laughter briefly rippled through the audience as the Vermont senator returned to his statistic-rich pitch for increasing the federal minimum wage to $15 per hour and breaking up big Wall Street banks.