Rep. Fred Upton is much more than a member of Congress, he's the proud uncle of Kate Upton -- so we've got to know his stance on that most critical election year issue ... the cat daddy dance. Check out TMZ on TV -- click here to see your local listings!

Kate Upton's family is NOT embarrassed by her jiggly supermodel ways ... this according to her uncle, who also happens to be a friggin' U.S. Congressman! TMZ spoke with Fred Upton (R-Mich) in D.C. yesterday ... who ensured us Kate is nothing short of a "great gal" ... which we already knew because…