Senator Tom Cotton has sent a letter to Intel's board chair raising concerns about CEO Lip-Bu Tan's connections to China. The letter also questions Tan's leadership during his time as CEO of Cadence Design, referencing subpoenas issued during that period. The inquiry adds to the ongoing scrutiny of technology companies and their relationships with China, particularly in the semiconductor industry. The letter's contents and Intel's response are likely to be closely watched given the current geopolitical climate.