There have been reports for a while now that Jeb is going to get much tougher on his Republican opponents. This is a reflection that he’s been underperforming — it’s hard to float above the fray when you’re bunched up with a number of other contenders. But I’m not sure attacking other Republicans will do much for Bush at this point, except highlighting that his campaign isn’t as formidable as first expected. What might actually help him is picking a couple of sharp, high-profile fights with the Democrats and the Left. Bush’s ability and willingness to criticize his own party aren’t in doubt among the rank and file, but his conservatism and his willingness to stand up to the other side are. That’s the graver threat to his campaign than any other candidate right now.