What started out as a quick cameo on “Saturday Night Live” playing then-presidential candidate Donald J. Trump has turned into the role of a lifetime for Alec Baldwin. Aside from a second straight season of portraying Trump on “SNL,” Baldwin is now offering fans a satirical look at the president’s first 100 days in office in the parody memoir “You Can’t Spell America Without Me,” co-written with Spy magazine co-founder Kurt Andersen. Alec told Howard his decision to put out this book quite literally started out as a joke.