Federico Peña, the former Denver mayor and U.S. secretary of transportation and energy, is throwing his support behind Joe Biden in the 2020 Democratic presidential primary — overlooking two of Colorado’s own statesmen.

Peña tops a newly released list of 15 Democrats who are among the first Coloradans to endorse the former vice president’s candidacy. Others on the list, provided first to The Denver Post, include state Sen. Adrienne Benavidez of Adams County and state Rep. Bri Buentello of Pueblo.

The Biden campaign also is announcing endorsements Monday morning in Tennessee, Florida, Utah and Maryland.

“Each and every one of these leaders are trusted voices in their communities, and I am proud to have earned their support,” Biden said in a statement. “Their endorsements are crucial to this campaign. I look forward to standing alongside them and speaking with voters in their communities about rebuilding the backbone of our country – the middle class – and unifying America.”

Biden is the current front-runner for the Democratic presidential nomination amid the largest and most diverse field of candidates in the nation’s history. Other top contenders include U.S. Sens. Bernie Sanders, who won Colorado’s 2016 caucus, Elizabeth Warren and Kamala Harris.

The roster of candidates includes two Coloradans: U.S. Sen. Michael Bennet and former Gov. John Hickenlooper.

Biden’s announcement follows news that rival Harris will stump in Colorado on Friday. The California senator is expected to address supporters at Denver’s storied Manual High School, which played a crucial role in Denver Public Schools’ attempts to integrate during the 1970s and 1980s.

Here’s who else is endorsing Biden: