Autographing photos of himself on the campaign trail, U.S. Republican presidential candidate Jeb Bush held up one that showed him heavier by 40 pounds (18 kilograms) and another of the slimmed-down campaign model.

“That’s a low-energy picture,” Bush, 62, chuckled after the portly version was thrust into his hands in Salem, New Hampshire, site of a town hall event. “This is a high-energy picture,” he said of the skinnier Jeb photo…

Initially stung when Trump, 69, pinned the “low-energy” label on him, Bush is taking a two-prong approach, joking about it and showing more fire on the campaign trail. He plans to take a more aggressive tack at the debate at the Ronald Reagan Presidential Library in Simi Valley, California.

“If someone comes at me, bam! I’ll come back at ’em,” he said in Salem, smacking a fist into a palm. “I’ll campaign hard.”