Political thriller with ominous overtones to POTUS re-released in time for holidays

I first heard about this novel which was featured on the Rachel Maddow Show … during a recent feature on Trump’s paranoia (honestly, when isn’t this an issue?). At the time, Amazon was not carrying it. Now the retailer is. Cool.

Senator Jim MacVeagh is proud to serve his country—and his president, Mark Hollenbach, who has a near-spotless reputation as the vibrant, charismatic leader of MacVeagh’s party and the nation. When Hollenbach begins taking MacVeagh into his confidence, the young senator knows that his star is on the rise.

But then Hollenbach starts summoning MacVeagh in the middle of the night to Camp David. There, the president sits in the dark and rants about his enemies, unfurling insane theories about all the people he says are conspiring against him.