According to the AP, Jon Huntsman is making it official June 21.
His move comes a day after a debate in New Hampshire, a state he'll play for, which he said he would not take part in because he hadn't yet jade up his mind about running.
He's announcing his campaign in New Jersey, at Liberty State Park - home to the statue - a setting that doesn't have much to do with his roots or a natural constituency (like, say, a Mitt Romney announcement based in New Hampshire, or a Michele Bachmann announcement in Iowa.