<p>Iowa labor leaders Wednesday urged TV stations to pull anti-immigrant political ads that appear to represent a coalition of Iowa workers.</p>
<p>"They don't represent anybody in the labor movement in Iowa," said Iowa Federation of Labor President Mark Smith.</p>
<p>The ads, airing on KCCI and WHO television stations in central Iowa, call on the presidential candidates to change their positions on allowing more immigrant workers into the United States. The image of a fist hitting a punching bag, printed with a human face, is shown while a narrator talks about foreign workers dragging down wages and taking jobs away from Iowans.</p>