https://www.cnbc.com/2017/10/19/facebook-general-counsel-colin-stretch-to-testify-in-russia-probe.html >The lawmaker overseeing the probe into how Russian agents used Facebook to sway last year's U.S. election was hoping to hear from one of the company's technical experts. >Instead, Facebook will send its top lawyer and a former Washington insider to testify on Nov. 1.