Some point out that to pass a law that limits abortions is tantamount to endorsing child murder, so long as those restrictions are met.
For instance, in the case of a 20-week abortion ban. The law says any baby 20 weeks or older cannot be murdered. So, does that mean it is morally licit to murder babies 19 weeks old or younger?
Their solution would be to pass laws that make abortion illegal (as it ought to be). Anything less, to them, appears to be cooperation with evil.