As more information is revealed about the serious potential of LightSquared's broadband to interfere with GPS signals, opposition continues to grow. A May 23 GPS World article states that nearly 1/3 of U.S. Senators have signed a letter urging the FCC to take a closer look. Another article from May 24 goes even further, citing a statement from Javad Ashjaee of JAVAD GNSS that likens the LightSquared initiative to "aggression", and urges the U.S. government to protect our GPS system.
Note that, according to the May 23 article, neither of our Texas senators has yet signed the letter to the FCC.