美国参议院Cantwell发函电信运营商AT&T和Verizon，询问关于州和地方政府税收（SALT）的问题。

Core Viewpoint - The U.S. Senate, represented by Senator Cantwell, has reached out to telecommunications operators AT&T and Verizon to inquire about issues related to state and local tax (SALT) [1] Group 1 - Senator Cantwell's inquiry aims to address concerns regarding the impact of SALT on telecommunications companies [1] - The letter specifically targets AT&T and Verizon, indicating a focus on major players in the telecom industry [1] - The inquiry may lead to further discussions on tax policies affecting the telecommunications sector [1]