Former Vice President Joe Biden attempted to assure voters on Monday that Republican efforts to paint him as a “radical socialist” were inaccurate, but may have inadvertently taken a swipe at his vanquished progressive rival, Sen. Bernie Sanders (I-VT) Biden, who has struggled to make inroads with his party’s left wing, was asked during an interview with a local Fox affiliate in Wisconsin if he was concerned about recent claims President Donald Trump made alleging the Democrat ticket is a “trojan horse” for more radical elements of the progressive movement.