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. Get a daily selection of our top stories based on your reading preferences. 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…