UPDATE 1-McCain raises concerns about possible China bid for U.S. microchip maker
July 15, 2015 at 17:08 PM EDT
WASHINGTON, July 15 (Reuters) - Republican U.S. Senator John McCain on Wednesday raised concerns about the potential national security implications of a proposed bid by China's Tsinghua Unigroup Ltd's to acquire U.S. chip maker Micron Technology Inc, and called for a thorough U.S. review.