Ro Khanna finally did something worth mentioning. The anti-capitalist congressman from Silicon Valley has dethroned Nancy Pelosi as the most prolific stock trader on Capitol Hill. Since 2025, Khanna's family has made roughly 7,200 trades involving stocks and other securities valued at up to $147 million, the New York Times reports. Pelosi, meanwhile, has reported just 17 transactions over that period, involving shares with a maximum value of $84…