Bottom line: US national security regulators are likely to approve the potential purchase of Micron by China's Tsinghua Unigroup to demonstrate their commitment to fair trade and avoid politicizing cross-border high-tech M&A . In the days after reports emerged that China's Tsinghua Unigroup was planning a bid for US memory chip giant Micron , media have been buzzing with speculation over whether Washington might veto a deal on national security grounds.