By Steve Contorno, CNN Phoenix (CNN) — This weekend’s gathering of young Republicans and conservative influencers in the Arizona desert offered a glimpse into the divisions already fraying President Donald Trump’s coalition even before its lame-duck leader is out of the picture. Enter Vice President JD Vance, a figure many in the movement view as the man who can keep the party’s big tent together through the Trump era and beyond. Speaking Sunday at Turning Point USA’s annual conference, AmericaFest, Vance not only addressed head-on the friction pulling at the party, but he also encouraged attendees to embrace it. “I...