I searched several queries and the only thing I found was a speech or letter he wrote after running as a Democrat something or other......my bet is DEMOCRAT!
https://voterrecords.com/voters/hubbard-us/richard+keenan/1
Person Location Voter Details
Richard D Keenan
Age: 65
Born: 1950
Residential Address:
331 Moore St Hubbard Oh 44425 Party Affiliation: Democratic Party
Registered to Vote In: Trumbull County, OH
Registration Date: 09/16/1971
Voter Status: Active