A political action committee backing former state Sen. Michael Johnston of Denver for the Democratic nod for governor has received another $1 million dollars from Michael Bloomberg, bringing the wealthy former New York mayor’s total donations to the committee to $2 million. ... The $1 million contribution was the largest that any campaign committee received in the most recent reporting period from May 31 to June 13, according to the secretary of state’s office’s TRACER campaign finance system. Second on the list: another $750,000 from fellow Democrat U.S. Rep. Jared Polis of Boulder to his gubernatorial campaign, bringing his total...