Is a contribution to a 501 (c) (6) organization considered a tax deductible?

Dues to a trade association may be deducted with one complication. Money spent on lobbying activities is not deductible. So the trade association can either tell its members not to deduct that portion of their dues or the trade association may elect to pay a "proxy tax" rather than provide the information disclosure about what portion of the dues is not deductible.