WASHINGTON — A bipartisan Senate duo is aiming to reduce the influx of political mail to households by cutting off a key federal subsidy that boosts Republican and Democratic party committees .

Currently, national and state committees for the major political parties can get the same 40-60% discount rate nonprofits enjoy for mailers sent through the US Postal Service . Third parties don’t get the perk.

New legislation, dubbed the Ending Subsidies for Political Junk Mail Act, which was proposed by Sens. Joni Ernst (R-Iowa) and Catherine Cortez Masto (D-Nev.), would force the GOP and Democratic party committees to pay the normal rate, The Post has learned.

“No more welfare for Washington consultants,” Ernst told The Post. “If the American people must pay full price to send a Chri

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