WASHINGTON - The Bush administration is challenging a court ruling that White House visitor logs are public documents, saying releasing the records would infringe on the separation of powers. ADVERTISEMENT White House documents are normally exempt from public records laws, but a federal judge ruled in December that Secret Service visitor logs must be released. The court sided with a liberal watchdog group that sought records showing visits by prominent religious conservatives to the White House and Vice President Dick Cheney's residence. http://news.yahoo.com/s/ap/20080421/..._house_secrecy WHAT ARE THEY HIDING? Inquiring minds want to know.