A congressional standoff over domestic spying is intensifying. On Wednesday, the House Judiciary and Intelligence committees approved measures increasing judicial oversight of the Bush administration’s warrantless spy program. Democratic lawmakers also refused to include a provision granting retroactive immunity to major telecommunication companies involved. Hours before the vote, President Bush said he would not sign the legislation without the immunity clause included. Civil liberties groups say the Democratic measure still grants too much authority to the White House. The bill would still give blanket authority for group spying rather than requiring individual warrants.