Sen. Harry Reid was designated to watch from an "undisclosed, secure location" as President Bush delivered his State of the Union address Tuesday.
Reid, the No. 2 Democrat in the Senate, was one of several congressional leaders selected by party leaders to stay away from the Capitol during the one-hour speech as part of a plan Congress enacted after the Sept. 11, 2001, terrorist attacks. Normally congressional leaders are in the audience in the House chambers.
Reid's office said there was no specific, known threat and Reid's absence from the speech was precautionary.
"I'm sorry I'll miss the speech, but I was asked to take on this responsibility for the country and I'm happy to do it," Reid said in a statement.