The education of David Hogg.

A lot has changed since I first met David Hogg in 2018.

He has a beard now, and a girlfriend.

He's about to be a senior at Harvard, studying the history of conservative political movements.

There's a new President, and a new party in control of Congress.

He's in therapy these days.

At the same time, so much has not changed. In the four years since Hogg and his friends in Parkland, Fla. , launched the March for Our Lives movement, there have been at least 611 incidents of gunfire on school grounds, according to Everytown for Gun Safety.

Firearm-related deaths have overtaken auto accidents as the leading cause of death for children in the US.

"I'm sick and tired of us giving ourselves pats on the back for trying," Hogg told me on the morning of June 9, a little over two weeks after a gunman killed 19 children and two teachers at an elementary school in Uvalde, Texas, and two days before the March for Our Lives movement held rallies around the country on June 11. "Objectively we've been failing."

That may finally change now that 20 US Senators are pushing a bipartisan bill to address gun violence.