I don't expect to ever see abortion as a main campaign issue. Just because it would not impact that many votes. The pro-life and pro-death sides are already committed. And the sad truth is that the majority of voters don't care about anything that does not effect them personally. That's why I give to Right-to-Life groups, it's their job to try to reach that apathic middle.
If you want to see campaigns that make abortion a major issue. Then work to remove these limits on campaign contributions. Alan Keyes has pointed out that these limits force candidates to water down their message in order to attract support from as many people as possible. Also no limits would allow candidates to base their campaign on just one or two issues. Imagine what would happen if a few rich pro-lifers each gave Alan Keyes a couple of million, to get his message out. At the very least we would be having some very interesting elections.
I guess all politics is local but in Pennsylvania the abortion issue is major. Bush lost bigtime (-200,000 votes) here running as a mushy moderate and Sen.Rick Santorum easily won re-election (+300,000 votes) on the same ballot running as a strong pro-lifer.