CUYAHOGA FALLS, Ohio—As the Republican National Convention begins in Cleveland without many party stalwarts, Gov. Christie took aim Monday at GOP leaders who haven't thrown their support behind Donald Trump – but was coy when asked if he'd become "the next attorney general."

"It is unacceptable to me, and it should be unacceptable to you … that anyone who signed that pledge is now not adhering to that pledge," Christie said at a breakfast for Michigan's GOP delegates, referring to the pledge signed by the now-vanquished Republican primary candidates – including him – to support their party's nominee.

Voters have spoken, and "I am tired of being dictated to by people in Washington, D.C. who think they know better than the millions of people in this country," said Christie, who endorsed Trump after dropping out of the race in February.

Describing his personal experience with the businessman, Christie told delegates to dismiss "all these wild things that you hear some of the mainstream media tell you about Donald Trump." He called Trump generous, saying that when Mary Pat Christie asked the mogul if he would donate to Hurricane Sandy relief, Trump said: "How much does the check need to be? Just tell me, and I'll send it."

Christie – who was passed over for the role as Trump's vice president – also praised the presumptive nominee's choice of Indiana Gov. Mike Pence to join the ticket. "I am really relieved that Donald Trump picked a governor to be his running mate," said Christie, who didn't mention his being in contention for the role.

He also didn't name another reported contender for the position, former House speaker Newt Gingrich, as he said: "We don't need another big mouth from Congress, quite frankly."

Christie's political future was of some interest to the Michigan delegates. "When asked, please say you'll be the next attorney general," a woman told Christie during a question-and-answer session. ("That's very nice, and very kind," Christie said, adding that "we'll see what life brings.")

Presuming that Christie would be selected as attorney general, Randy Bishop asked the governor: "Will you announce today, right here, that you will prosecute Hillary Clinton?"

Christie said it would be wrong for him to "prejudge" the matter, but joked: "Listen, it is very tempting to give into what I know would be an enormous applause line."