These are just the few young people that Trump has engaged with directly. Through Twitter and other social media channels, the president can reach this entire next generation of voters without any filter. He can read their individual messages of solidarity or critique, and instantly elevate supporters’ voices even before they can cast a ballot.

Trump lost the youth vote handily in November — only 37 percent of voters ages 18 to 29 cast ballots for the president, compared to Hillary Clinton’s 55 percent, according to analysis of exit polls by Tufts University. He drew roughly the same share of this demographic as Mitt Romney did in 2012.

But this bloc is also disproportionately likely to get their political news from social media, Trump’s turf. Teens who can’t yet vote are even more likely to be on social media, although many prefer Snapchat, Instagram or other platforms over Twitter.