It’s become conventional wisdom in the 2016 Republican race: Attack Donald Trump and watch your poll numbers go down. It happened to Rick Perry, it happened to Rand Paul, it happened to former front-runner Jeb Bush. The lesson might seem obvious: Don’t attack Trump.

Nevertheless, Louisiana Gov. Bobby Jindal has scheduled a speech Thursday in Washington at which aides say he will aggressively take on Trump. “The governor will talk about the completely unserious notion of Donald Trump as president of the United States,” top adviser Curt Anderson told reporters Wednesday afternoon. “He’s not going to pull any punches.”