Defiant? Poor choice of words, IMO. More like p*ssed off and tired of getting scr*wed over by the Clintonista camp and their media shills.

Defiant Sanders camp: It ain’t over
Gabriel Debenedetti | Politico
June 7, 2016
http://politi.co/1WDMEZv

[snip]

LOS ANGELES — Hillary Clinton became the presumptive Democratic nominee on Monday night, but Bernie Sanders still has a big problem with the word “presumptive."

Even after the Associated Press declared Monday that she would become the first woman to top a major party ticket this fall, the increasingly combative Vermont senator’s posture — and that of his increasingly furious campaign team — remained clear: This ain't over.

“It was one of the most appalling things I’ve seen in a long time,” senior campaign adviser Mark Longabaugh said of the AP call, noting that the organization had taken weeks to count Sanders’ delegates from Washington state earlier this year, a saga that roiled the Sanders team, but somehow managed to chase down enough undeclared superdelegates to declare Clinton the primary winner on the eve of the campaign’s last big primary day. “Yet here they are haranguing and badgering super delegates before the final votes were cast. On top of the fact that they’re awarding delegates in Puerto Rico when the counting isn’t even finished in Puerto Rico."