DENVER, CO--Union company taxi driver, Abdi Buni, right, hugs Mayoral candidate, Chris Romer on stage at the International Union of Operating Engineers Local 9, Thursday morning. The IUOE endorsed Romer during the event. Andy Cross, The Denver Post [Getty Images]

DENVER, CO--Union company taxi driver, Abdi Buni, right, hugs Mayoral candidate, Chris Romer on stage at the International Union of Operating Engineers Local 9, Thursday morning. The IUOE endorsed Romer during the event. Andy Cross, The Denver Post (Photo By Andy Cross/The Denver Post via Getty Images) — see more

DENVER, CO--Union company taxi driver, Abdi Buni, right, hugs Mayoral candidate, Chris Romer on stage at the International Union of Operating Engineers Local 9, Thursday morning. The IUOE endorsed Romer during the event. Andy Cross, The Denver Post (Photo By Andy Cross/The Denver Post via Getty Images)