If they have almost no effect than they have almost no power - isn't that tautological? Also it should be noted the paper contrasts public opinion to 'organize

If they have almost no effect than they have almost no power - isn't that tautological? Also it should be noted the paper contrasts public opinion to 'organized interest groups': > Our third and fourth theoretical traditions posit that public policy generally reflects the outcome of struggle among organized interest groups and business firms. But in a number of cases organized interest groups are representative of a significant sector of public opinion (the NRA being one such example, or the ACLU is another).