My counterexample is Rudy Giuliani.
While he is pro-choice, during his term as Mayor of New York the police arrested everyone for everything. Crime plummeted.
start that danged crusade already...
Pro-choice Rudy Giuliani's crime fighting is a good counterexample, but you could also say that the decrease in petty crimes and even violent crimes New York has seen is insignificant compared to it being one of the most dangerous places in the world to be an unborn baby.