At Democratic debate in Las Vegas, expect a battle between Bloomberg and other candidates

Riding a wave of several hundred million dollars worth of advertising – and despite the onslaught of negative information about his opinions on race, stop-and-frisk, and his past support for Republicans – former New York City Mayor Mike Bloomberg has climbed to second place in some recent national polling of Democratic presidential candidates.

As a result, Bloomberg won a place on stage at Wednesday night’s Democratic presidential candidate debate in Las Vegas.

But though he was the last candidate invited, Bloomberg is certain to be the center of attention. Indeed,...