Four of the 15 chiefs of Obamacare insurance marketplaces run by states and the District of Columbia have either quit or gone on leave since the botched Oct. 1 launches of their healthcare exchanges. ... more 
Four of the 15 chiefs of Obamacare insurance marketplaces run by states and the District of Columbia have either quit or gone on leave since the botched Oct. 1 launches of their healthcare exchanges. CNBC's Dan Mangan explains. less 
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Wed, Dec 18, 2013 4:33 PM EST