Nathan 'Nate' L. Libby is an American politician from Maine. A Maine native and graduate of Bates College, Libby was elected to the Lewiston City Council, representing Ward 3, in 2011. In 2012, Libby was elected to the Maine House of Representatives from District 73, covering part of Lewiston, Maine. In 2014, Libby was elected to the Maine Senate from District 21, comprising the city of Lewiston, becoming one of the youngest state senators in the country
In 2013, Libby co-wrote comprehensive tax reform legislation that would lower the state income tax, broaden the sales tax and expand the homestead property tax exemption to $50,000, but the measure failed to pass the Legislature. Libby was the primary sponsor of legislation to restore consumer rate review in the individual- and small-group health insurance markets, a measure enacted by the Legislature but vetoed by Governor LePage.