Here is perfect example of why the "Communion Game" of "Your beliefs are not good enough" is unacceptable. I've never heard of Douglas Kmiec before this morning, but according to Catholicnews.com, he has been refused communion by a priest for endorsing Barak Obama.
The Pepperdine law professor was an architect for the Reagan Administration's stance against abortion. In fact, he's well known "pro-lifer" who's been rather involved in the "pro-life" movement. The Mass where he was denied communion preceded a meeting of a California business group where he was the featured speaker. The priest took the opportunity to admonish him at the homily and then deny him communion.
This is simply the logical extension of this communion game where prelates decide that a certain Catholic's beliefs are not good enough to come to come to the Lord's table. Is our measuring stick for who can receive communion God's infinite grace or a certain clergy person's personal beliefs?