Keep on using kids to drive public policy. 

Via CNN: 

Barack and Michelle Obama penned a letter to the "inspiring" students of Parkland, Florida, in the wake of the tragic school shooting last month that left 17 dead and launched a national conversation on gun violence.

In the letter, dated March 10, the former President and first lady wrote that the students' leadership has "helped awaken the conscience of the nation."

Many of the survivors of the Marjory Stoneman Douglas High School shooting and students around the country have channeled their grief into fighting the gun lobby, making impassioned pleas on television, meeting with lawmakers and preparing for a nationwide protest dubbed "March for our Lives," which will take place in Washington this Saturday.

A source familiar with the letter, previously reported by Mic, confirmed its authenticity.

...One day after the Parkland attack, the former President called for "common-sense gun safety laws" in a tweet.

The former President and first lady have previously expressed praise for the Parkland students.

He tweeted later last month, "Young people have helped lead all our great movements. How inspiring to see it again in so many smart, fearless students standing up for their right to be safe; marching and organizing to remake the world as it should be. We've been waiting for you. And we've got your backs."

Read more here.