Richard Trumka, who led the AFL-CIO since 2009 as President, passed away unexpectedly today.

“Rich was a relentless champion of workers’ rights, and even as we mourn his passing today, we will st and on his shoulders to continue the fight for workers, and for the fair and just society he believed in so passionately,” AFL-CIO Secretary Treasurer Liz Shuler tweeted today. “We will honor his legacy with action.”