“Press that white button! This right here,” the former secretary of state instructed a technologically deficient fan in New Hampshire who was fumbling to work an iPhone camera. Her patience thinning, Hillary Rodham Clinton took matters into her own hands and jabbed the button herself. And with the sound of an electronic shutter snap, another selfie — the must-have political souvenir of 2016 — went up into the cloud for campaign posterity.

Who wants their babies kissed or their yard signs autographed anymore? This is the Selfie Election. And if you are running for president, you have no choice but to submit.

Candidates can now spend an hour — or sometimes two, as Senator Rand Paul did last month in New Hampshire — exhausting a line of eager selfie seekers. Others, like Senator Ted Cruz, have learned to add an extra 20 minutes at the beginning and end of events because so many people want pictures.

Jeb Bush has perfected a technique suited to his 6-foot-3 frame: For his shorter fans, he will take the picture with his own outstretched selfie stick of an arm. The sons of Gov. Scott Walker have watched their father take so many, they say he has significantly polished his shutterbug skills. Gov. Chris Christie’s staff says he has taken “too many to count.”