Neither can a single Senator or Congressman, but his/her position on Abortion is a factor in my vote.
I will not vote for anyone who disavows the death of innocent life.
Would you vote for someone who is militantly pro-abortion like Hillary? If not then you have to realize that not voting for a "mildly pro-choice" candidate hands the election to the unsavory characters at moveon.org.
Lots of innocent Iraqis have been killed as collateral deaths in military actions in Iraq. It's sad, but it cannot be avoided, just minimized, in the pursuit of our goals in Iraq. Does that mean you don't support Bush?