If the latest spat feels like a 2020 preview, that’s because the candidates seem to think it is.
Her campaign said the briefing went on for two hours and took place at the FBI offices in White Plains, north of New York City, near the Clinton's home in Westchester County.
Clinton officially became the first woman to lead a major political party's ticket and delivered an acceptance speech loaded with attacks on her Republican foe.
Delegates being asked to fork out $3,000 to $8,000 for the four-day convention say the costs are prohibitive to political participation.
Hillary Clinton has more delegates and individual votes than Bernie Sanders, but the Vermont senator has vowed to take the fight to the Democratic Convention.
Clinton appeared assured of clinching a majority of pledged Democratic delegates as voting wrapped up in six states during the election's last big primary night.
Sanders intends to battle all the way to a contested national convention, even though the AP says Clinton has already secured enough delegates to clinch the nomination.
The former US president does not take heckling lightly.
The former secretary of state is now just 30 delegates shy of securing the number needed to win her party's nomination.
Hillary Clinton still maintains a substantial lead over Sanders overall, and Wyoming has just 14 pledged delegates, the fewest of any state.
She swiped and swiped again, first too slow and then too fast and then glacially slow, all while shameful eyes stared down upon her.
Democrats Abroad has organized polling places world-wide on Super Tuesday, and there are 21 delegates up for grabs.