NEW YORK – New York City Mayor Bill de Blasio has quite a lucrative relationship with the city’s labor unions.

Just one month before the United Federation of Teachers union landed a massive $9 billion contract with the de Blasio administration, the union contributed $350,000 to the mayor’s non-profit lobbying group – Campaign for One New York.

Campaign for One New York was formed late last year to promote de Blasio’s push for universal pre-K for all city students and his “broad progressive agenda,” according to a Campaign spokesman cited by the New York Post.

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“To have a newly elected mayor start a nonprofit organization to support his big initiative – and then go calling for dollars from those who are involved in the city’s business – is unseemly,” Dick Dadey, director of Citizens Union, a government watchdog group, told the Post.

So far, de Blasio has raised $1.7 million for Campaign for One New York, which includes three groups – SEIU Local 1199, a healthcare union that help elect the mayor in 2013; Unite Here, which has ties to de Blasio’s cousin John Wilhem; and New York Progress PAC, which also spent heavily in the 2013 election – that have contributed a combined $625,000, the Post reports.

The Rockefeller Family Fund gave the group a quarter-million dollars, and other smaller donations have come from groups or individuals in various city issues, such as taxi cabs and horse carriages.

What it all boils down to is a disgusting abuse of public trust bred by an incestuous relationship between the city’s “progressive” mayor and his special interest benefactors. It’s crony politics at its worst, and it’s taxpayers, students and others who depend on the city’s public services who will ultimately pay the price for the mayor’s dangerous business practices.

The shady political back-scratching is also completely unnecessary, as the state has already agreed to provide pre-K funding. De Blasio has insisted on taxing the city’s “rich” to fund his initiative.

Campaign for One New York is now apparently focused on de Blasio’s “broad progressive agenda.”

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“When the state picked up the pre-K tab, the group turned its attention to letting Brooklyn residents know how the mayor ‘saved’ Long Island College Hospital, which is actually closing to make way for high-rise condos with an emergency room,” the Post reports.

“While some of (de Blasio’s) best pals were pumping funds into the lobbying group, other donors were writing checks directly to the mayor’s re-election campaign for 2017. Records show de Blasio has already collected $44,100 and has spent $32,000.”