New York Mayor Michael Bloomberg and philanthropists Bill and Melinda Gates top the donor list to proponents of Amendment 66, the school finance measure that includes a $950 million tax hike.
Bloomberg Philanthropies added $1.05 million to the effort, and the Gateses contributed $1 million, pushing the Yes on 66 fundraising total past $10.2 million.
Those two contributions accounted for the vast majority of the $2.54 million raised in the last two-week reporting period for Colorado Commits to Kids, the issue committee behind the measure.
Bloomberg's involvement in Colorado issues already has proved a political lightning rod.

FILE -- This July 23, 2012 file photo shows Co-founder and Chairman of the Bill and Melinda Gates Foundation Bill Gates (Jim Watson, Getty Images)
Colorado Republicans have blistered Bloomberg ever since Democrats unveiled their package of gun-control legislation in February. They called Bloomberg, who founded Mayors Against Illegal Guns, the "de facto governor of Colorado