From the STLtoday:
Of the six Catholics running for president, only Republican Sen. Sam Brownback has a legislative record on abortion that meets the church's approval. Along with Republican Rudy Giuliani, Democrats Sen. Joseph Biden, Sen. Christopher Dodd, Rep. Dennis Kucinich and Gov. Bill Richardson all have public records that are inconsistent with church teaching on abortion rights.
"It is a cause of concern for me and for all bishops to find ourselves in this situation," Burke said in an interview last week.
Asked if he would deny Communion to Giuliani if the former New York mayor approached him for the sacrament at the Cathedral Basilica, Burke said: "If the question is about a Catholic who is publicly espousing positions contrary to the moral law and I know that person knows it, yes I would."
In an interview earlier this year, Burke said of Giuliani: "I can't imagine that as a Catholic he doesn't know that his stance on the protection of human life is wrong. If someone is publicly sinning, they should not approach to receive Holy Communion."
(H/T: Andrew Sullivan)