No, in my lifetime, all the Protestants that I’ve known who have gone “Catholic” are liberals or “moderates” in their political thinking.
One wonders why they'd go through so much effort to join a church that teaches abortion, euthanasia, embryonic stem cell use, human cloning and homosexual relations are all "intrinsically evil actions" and opposes artifical birth control, divorce, ordaining woman, etc., etc. Doesn't sound to me like anyone who is liberal or moderate in their political thinking would be too happy in a church like that. Assuming what you say is true, the only possible reason they switched denominations might be because the married a Catholic and did so to please him/her. Perhaps you could introduce me to some these political "liberal/moderates" who switched from Protestant to Catholic, they seem to be confused. Whenever I hear about someone well known switching from protestant to Catholic (Jane Roe, Clarence Thomas, Sam Brownback, etc.), it's because they've moved right-ward politically and are not happy with their protestant churches "values"