Graham Platner’s political rise in Maine was swift. After defeating former Gov Janet Mills in the June 9 Democratic Senate primary, the oyster farmer and Marine Corps veteran had appeared poised to challenge Republican Sen Susan Collins. But less than a month later, he suspended his campaign after a former girlfriend accused him of sexual assault, an allegation he has denied.Platner announced his withdrawal on July 8. Blaming the political establishment for undermining his campaign. And his exit left Maine Democrats scrambling to find a replacement and exposed divisions between progressive supporters who backed his outsider candidacy & party figures...