No. If a candidate won't defend life, how could they reliably defend liberty? It'd be inconsistent or show flawed reasoning.
I marvel at people who say there are bigger issues. We've killed 55 million of the unborn in the US alone since Roe vs. Wade. I oppose our foreign entanglements because I am consistently pro-life. Even for all our war machine, have we killed more than 2 million that way? 6 million is the number frequently cited for holocaust. Is the economy more important? Devalued money? I guess those of us who are allowed to live might see it as a more immediate problem, since we have to deal with it, and can forget those who are dead. Is legal due process or any civil liberty more important when swathes of us are being arbitrarily denied of every single liberty with no due process at all?
It all comes down to whether you see the unborn as human. If you do, and you really think about it, it looms far beyond any other issue. And that's why many pro-life people see it as a make or break issue.
Firstly, there's the whole "We" thing. There is no "We". I haven't killed anyone. The government has killed a lot of people, but that through foreign wars, not abortion. It is the women themselves, and their doctors, who murder those children in the womb.
In foreign war, the government itself commits murder.
In addition, 55 million would hardly drop to 0 if it was banned. I don't think it would matter much at all to the number killed. Maybe a few get punished. Good. I'm all for that. But the foreign wars affect everything. They affect our liberty in every way. Maybe I'm just selfish, but I want to be free...
I don't completely agree with this abortion article by Laurence Vance, I think he underplays the issue a little bit, but I think he makes a compelling argument for the "Its not the most important thing" argument. I'm somewhere in between you and Vance. I think abortion (Pro-life) is more important than side-ish issues like weed, legalizing prostitution, or such. But when it comes to the core of the movement, the foreign policy, constitututional liberty, exc. that's the most important. I believe Ron and Rand are sincere, but most Republicans don't care about abortion, they advocate its ban so they can get votes.
http://lewrockwell.com/vance/vance298.html
Rothbard did not see legalized abortion as incompatible with liberty, and he was arguably among the top 3 most important libertarians of all time.
I believe Rothbard was wrong. I respect him, but I still think he's wrong. Just remember Rothbard was a huge fan of Ron Paul as well.