(Credit: AP Photo/Pablo Martinez Monsivais) Right now, the only force in American government that’s stopping Donald Trump’s excesses is the federal judiciary, as seen in decisions by a half-dozen different benches concluding his travel ban from Muslim countries was unconstitutional. But that line of defense could crumble, and is certainly poised to change under this White House, because Trump is positioned to fill more federal court vacancies than any past president since the late 1950s, according to legal analysts. “The fact that we have so many of these vacancies right now is due to the fact for the past two years the Senate [GOP] majority refused to do anything for the consideration of not only [Supreme Court nominee] Merrick Garland, but also the lower court nominations,” said Lena Zwarensteyn, American Constitution Society for Law and Policy director of strategic engagement.