Voting as Catholics

From Archbishop Burke's address at the National Prayer Breakfast:

Too often, in our time, our inability to accomplish all that we should for the sake of the defense of the right to life and of the protection of the integrity of the family is used to justify the direct choice of a political leader who espouses a position or positions in violation of the natural moral law. The Servant of God Pope John Paul II, in his Encyclical Letter Evangelium vitae, addresses at length the question of cooperation in evil which violates the dignity of innocent human life. He offers as an example the case of a legislator who has the possibility of voting for a law which would restrict the evil of procured abortion, even though it would not eradicate it completely. He concludes that the legislator could vote for the legislation, while his own opposition to procured abortion remains clear, for his vote does not in fact represent an illicit cooperation with an unjust law, but rather a legitimate and proper attempt to limit its evil aspects (Pope John Paul II, Encylical Letter Evangelium vitae , On the Good and Inviolability of Human Life, 25 March 1995, Acta Apostolicae Sedis 87 [1995], 487, no. 73). In an analogous manner, as voters, we are often faced with a choice among candidates who do not fully oppose unjust laws. In such a case, we must choose the candidate who will most limit the evil effects of unjust laws. But, there is no element of the common good, no morally good practice, which a candidate may promote and to which a voter may be dedicated, which could justify voting for a candidate who also endorses and supports the deliberate killing of the unborn, euthanasia or the recognition of a same-sex relationship as a legal marriage. The respect for the inviolable dignity of innocent human life and for the integrity of marriage and the family are so fundamental to the common good that they cannot be subordinated to any other cause, no matter how good it may be.

This is a pretty weighty statement. I was wondering if anyone had any input as to how the section in bold affects the lesser of two evils argument? I read it as though one may vote for a candidate who limits unjust laws, though he will not eradicate them, one may never vote for someone who supports positions so contrary to the natural law as those listed above.
Or, it is possible he is addressing the common argument that fighting poverty is equal to fighting abortion, or other such erroneous beliefs.

Thoughts?

Want to know more about Ron Paul?

Right now, the media wants to narrow the Republican race down for us: it's either McCain or Romney, in Florida and also in the nation. I'm sure even Mike Huckabee supporters are annoyed by this premature slant. Anyway, the chances are you are not going to find a news article this week about Ron Paul, though like Huckabee he is still in the race. However, the other day one of my friends forwarded me this article from the NY Times; though I am generally not a fan of the Times, I found the article interesting in its profile of Paul as a man and fairly balanced overall (but of course Paul is "anti-abortion" instead of "pro-life"). Previously, I had also read An Open Letter to Catholics on Ron Paul, which focuses more on the main issues at stake in the upcoming election.