Complex sentence: That same year in April, the "radical" Republicans who controlled Congress overrode President Andrew Johnson's vetoes and passed a Civil Rights Act, along with ratifying the 14th Amendment, extending citizenship to all Americans regardless of their race.
Split into simpler sentences: That same year in April, the "radical" Republicans who controlled Congress overrode President Andrew Johnson's vetoes and passed a Civil Rights Act. In 1868, they passed the 14th Amendment, extending citizenship to all Americans regardless of their race.