WASHINGTON (Reuters) -Elon Musk, Twitter's new owner, urged Americans to elect a Republican Congress in U.S. midterms on Tuesday to counterbalance President Joe Biden's Democrats, the first time a major social media CEO explicitly took a side. Tesla does not have unions at its U.S. factories. Republicans could use a majority in either chamber to bring Biden's agenda to a halt and launch potentially politically damaging investigations into Biden's administration and family. In a statement to Reuters, Jessica Gonzalez, co-CEO of Free Press, an advocacy group, said Musk's comment showed he "is not showing himself to be an even-keeled CEO that advertisers can trust." Last year Tesla moved its headquarters from California - its biggest market - to the more conservative state Texas. The U.S. Securities and Exchange Commission and the Federal Trade Commission have not commented on any potential probes. Source: Investing.com #Twitter