Twenty-one years ago, voters here chose Federico Peña as the city's first Hispanic mayor. Eight years later, they elected Wellington Webb as their first black mayor. Webb won a contest in which both candidates were African-American - and 68% of voters were white. Then last year, Denver picked its first white mayor in 20 years. Today, Census data show that racial and ethnic minorities in Denver now outnumber whites. No surprise here: Demographic shifts have rolled through Colorado's capital city for decades. "It's nice to see the demographics are catching up to my appointments," jokes Mayor John Hickenlooper, a brew...