Here's what to watch for during the "First Ever Twitter @Townhall at the White House," whose theme is supposed to be jobs and the economy: Will Twitter CEO Jack Dorsey manage to ask Obama more than 8 questions over the hour, beating the record set during the April 20 Facebook "townhall"? Will President Obama or Dorsey make a disparaging joke about marijuana legalization? Will the ever-dapper Dorsey be wearing a pocket square? Will any question about top economic adviser Larry Summers' work for Obama include mention of his new gig as a member of the board of Dorsey's new company, Square? Indeed, will Summers' name even get mentioned? Will anyone go off script? Seriously, while I am all for government embracing social media, I am not...