Sen. Robert Menendez and Rep. Albio Sires will again endorse Frank Lautenberg for the Democratic U.S. Senate nomination at an announcement at the Liberty House in Jersey City at 4PM tomorrow. Parking will be validated, according to the Lautenberg campaign, which also noted that the four-term Senator will also receive the endorsement of other Latino elected officials. Menendez and Sires first endorsed Lautenberg several weeks ago.