Internet service providers like Verizon Communications (VZ), AT&T (NYSE:T), Time Warner Cable (TWC) and Comcast (CMCSA) could be affected by legislation introduced by Sen. Ron Wyden on Thu. to cap their ability to impose limits on the amount of data broadband users can stream. The bill stands little chance of passage because Republicans who control the House oppose it. But FCC Chairman Julius Genachowski has indicated he may get tough on so-called "usage-based" billing. Verizon shares fell 0.6% to 43.57. Comcast fell 2.3% to 37.23.