The first time he said it – or rather tweeted it – was in January 2018. In describing his business, television, and political accomplishments, President Trump typed: “I think that would qualify as not smart, but genius… and a very stable genius at that!” He said it again at a NATO meeting that July. Again the following July 2019. And again in September. And October. It’s become one of this era’s defining lines of bravado and self-image that infuriates Trump detractors and fuels his supporters with equal amounts of pleasure. Now, it’s also the title of one of this era’s defining books – an exploration of Trump’s first three years, with deep context and new extraordinary reporting. Washington Post reporters Philip Rucker and Carol Leonnig have built on the work they do every day – and, if you watch cable news, it seems every night – to deliver the No. 1 New York Times Best Seller “A Very Stable Genius – Donald J. Trump’s Testing of America.” When they’re not writing ...