The political communication below was created in 1960 by the american federation of labor.

political communication with a photo of jack kennedy (john f. kennedy) on the top and richard nixon on the bottom. the text reads 'a look at the record – from labor's viewpoint, on key votes, jack kennedy has voted right 120 times, and wrong 2 times. richard nixon has voted right 10 times, and wrong 59 times'
©universal history archive/universal images group/imagequest 2019

what bias is shown in this political communication?

bias in favor of richard nixon
bias in favor of jack kennedy
bias against the american federation of labor
bias against jack kennedy