Tetra Images - Henryk Sadura/Getty Images(WASHINGTON) -- The son of the oldest victim in the Buffalo, New York supermarket shooting is expected to testify before the Senate Judiciary Committee on Tuesday in a hearing on domestic terrorism in the wake of the apparent racially-motivated attack that left 10 Black people dead, including his 86-year-old mother, and a national reckoning over gun violence as lawmakers consider gun safety legislation this week. The hearing, which kicks off at 10 a.m., is titled, "Examining the 'Metastasizing' Domestic Terrorism Threat After the Buffalo ...