You know Donald Trump is having an influence on the GOP primaries when “low energy” becomes a legitimate concern of all the presidential candidates. Jeb Bush is a nice guy, Trump says, but he’s a “low energy guy.”

Bush tackled the accusation head-on this Wednesday, insisting that he worked 80-hour weeks as governor of Florida and has the energy to serve. Now it’s Ben Carson’s turn to fight criticism that he’s also a low energy guy.

The National Journal’s Ron Fournier seems to think that Carson, a neurosurgeon, is immune from such criticism.