Now some fresh pickings from the Political Grapevine:

Overstaying Their Welcome?

An estimated 12 million immigrants are living in the U.S. illegally, but a new study finds that half of those entered the country with the permission of the U.S. government.

The Pew Hispanic Center calculates that as many as 5.5 million illegal immigrants are "overstayers," who entered the country with temporary visas — and remained in the U.S. after their visas expired. Another half million crossed into the U.S. from Mexico using a Border Crossing Card that allows short visits to the country, but never returned home.

The Pew Center, by the way, never refers to the subjects of the study as "illegal immigrants," preferring the term "unauthorized migrant."

No Apologies

Country Music's Dixie Chicks say they're taking back their take-back of a famous — and costly — slam on President Bush. Singer Natalie Maines told a concert audience in 2003 that the group was "ashamed the president of the United States is from Texas."

Maines apologized for "disrespecting the office of the president" after album sales plummeted, but now tells Time Magazine, "I don't feel he is owed any respect whatsoever."

The group's new album isn't getting much play on country radio either. One Miami station tells Billboard Magazine it pulled the single, "Not Ready to Make Nice," which references the scandal, due to listener complaints after only one week.

TV Blackout

A fourth television station in Columbus, Ohio, has refused to air an ad paid for by liberal activist group MoveOn.org that compares Ohio Republican congresswoman Deborah Pryce to scandal-plagued Republicans Tom DeLay and Jack Abramoff.

CBS affiliate WBNS-TV joins NBC, ABC and FOX stations in rejecting the ad attacking Pryce for taking contributions from big oil companies — and ABC and FOX refused to run a MoveOn ad accusing Pryce of being in the pocket of big drug companies last month.

WBNS President Tom Griesdorn says attorneys advised him to pull the ads after MoveOn.org could not sufficiently substantiate its claims — and says he could no longer continue to run the ads "in good conscience."

'In God We Trust,' or Do We?

From the wonderful world of education: officials at the Liberty Elementary School in Dallas are apologizing to parents for the school's yearbook cover, featuring a newly minted "liberty nickel" minus the phrase, "In God We Trust."

Administrators removed the words to appease families of all faiths and passed out a sticker with the missing phrase for unoffended students.

But the omission created an uproar among parents, one of whom tells the Dallas Morning News that she was "shocked" by the political correctness.

Judge Bans Prayer

And in Kentucky, a U.S. district judge granted the ACLU a restraining order to ban prayer at the Russell County High School graduation ceremony.

But 200 students spontaneously recited the Lord's Prayer anyway drawing a standing ovation.

—FOX News Channel's Aaron Bruns contributed to this report.

With more than 35 years of journalism experience to draw from, Brit Hume currently serves as a senior political analyst for FOX News Channel (FNC) and contributes to all major political coverage. Hume also is regular panelist on FOX's weekly public affairs program, "FOX News Sunday" on Sundays at 2 p.m. and 6 p.m. ET. Click here for more information on Brit Hume