“Mike Johnson has spent his 19 months as speaker forging a close relationship with President Donald Trump — in part to avoid the social-media bombshells that derailed so many Republican priorities during Trump’s first term,” Politico reports.“Now he has to deal with another, perhaps even more unpredictable online bomb-thrower.”“Elon Musk’s decision to launch a sudden scorched-earth campaign against the GOP’s domestic-policy megabill has forced Johnson into a sudden scramble to save the centerpiece of the Republican legislative agenda.”