COUNCIL BLUFFS, Iowa (AP) — Sen. Bernie Sanders is reasserting himself as the original champion of a progressive agenda many of his fellow 2020 Democratic presidential candidates have adopted.

Sen. Bernie Sanders, I-Vt, takes leave after speaking at a rally in Council Bluffs, Iowa, Thursday, March 7, 2019. (AP Photo/Nati Harnik)

At a rally of 2,000 in a western Iowa convention center, the Vermont senator jabbed at some of his rivals, saying, “Shock of all shocks, those very same ideas are now supported by candidates — Democratic candidates — for president.”

Prompting roars from the crowd — most of them Nebraskans and ineligible for Iowa’s leadoff caucuses — Sanders ticked through the agenda, leading with “Medicare-for-all,” supported by rivals including Sens. Cory Booker, Kirsten Gillibrand, Kamala Harris and Elizabeth Warren.

That shows how the landscape has shifted since 2016, when Sanders was the lone supporter for such policies as “Medicare-for-all” and the $15 minimum wage.