President Donald Trump’s intensifying legal troubles are unnerving some of his fellow Republicans. Despite his brash stance, they believe the turmoil has left him increasingly vulnerable as he gears up for what is sure to be a nasty fight for re-election.

Trump, ever confident of his ability to bend story lines to his will, mocks the investigations into his conduct as candidate and president as a “witch hunt” and insists he will survive the threats. As the legal drama plays out, political challenges that could threaten Trump’s re-election are piling up.