Tuberville, a Republican from Alabama, had heavily invested in Alibaba Group. A congressional financial disclosure indicates Tuberville has "divested" of Alibaba. Lawmakers are debating whether to ban themselves from trading stocks at all. Sen. Tommy Tuberville, one of Congress' most vocal critics of China, has quietly dumped his investments in an e-commerce and technology company with ties to the country's Communist Party. The Alabama Republican on January 14 executed three stock option trades, valued at between $80,003 and $200,000, that ended his investment in Alibaba Group, according to a disclosure he submitted to the US Senate on February 14. "This…