President Donald Trump’s $10 billion lawsuit against the IRS over the leaking of his tax returns ran into turbulence Friday as a judge ordered a hearing on whether the Constitution allows the president to sue the federal government he oversees. District Court Judge Kathleen Williams has asked Trump’s private attorneys and Justice Department lawyers representing the IRS to address whether his control over the government’s actions in the case means it’s the kind of dispute federal courts cannot consider. “Although President Trump avers that he is bringing this lawsuit in his personal capacity, he is the sitting president and his named adversaries are entities whose decisions are subject to his direction,” Williams wrote in a four-page order.