WASHINGTON – Republican senators on Wednesday further perpetuated President Donald Trump’s baseless claims of widespread voter fraud, two days after Democrat Joe Biden’s victory was sealed by the Electoral College.Lawmakers bickered heatedly at times during a committee hearing as Democrats pushed back against the unfounded allegations and a former federal cybersecurity official who oversaw election security said continued attempts to undermine confidence in the process were corrosive to democracy.The session, held by the Senate Homeland Security and Governmental Affairs Committee over Democratic protests, elevated the groundless claims of fraud to the highest levels of government and provided two of Trump’s lawyers with one more public.