USA 2016 Democrat presidential candidate Hillary Clinton is led away from the 9/11 ceremony early by aides - photo from FOX News video
USA presidential candidate Hillary Clinton had a 'medical episode' at the 9/11 memorial today and left the proceedings early. 

A law enforcement worker standing 15 yards away witnessed Clinton stumble, lose a shoe, and nearly faint as she entered her motorcade which then left the ceremony before its ending. 

episode - an incident / event
law enforcement - related to the police
witness - to see an event / incident
to stumble - to almost fall down
motorcade - group of (protective) cars that escort someone for security

Debbie Wasserman Schultz is stepping down as DNC chair after the DNC - photo by GETTY
Debbie Wasserman Schultz is resigning as the chairwoman of the USA's Democratic National Committee once the party's convention ends this week.

The Florida congresswoman is stepping down amid an email leak which reveals a conspiracy against the Bernie Sanders campaign for the 2016 Democratic nominee. Sanders lost the campaign to Hillary Clinton.

Sanders had called for Wasserman Schultz's resignation on Sunday and embraced it in a media interview today.

sabotage - the deliberate act of destroying something so it does not work
to resign - quit

to step down - to quit a position
leak - the act of letting something (secret information) escape (become known)
conspiracy - a secret plan
campaign - a project to succeed at a particluar result
nominee (noun) - a party's or group's candidate selection during an election
to embrace - to warmly welcome