President Joe Biden seemed to rebuke Republican presidential candidate Nikki Haley on Monday after she failed to cite slavery as the cause of the U.S. Civil War. He also slammed Donald Trump's claim that the 2020 presidential election was rigged. While speaking at Mother Emanuel AME Church in Charleston, South Carolina, Biden addressed Haley's remarks without saying her name. "So they say they embraced what's known as the lost cause, a self-serving lie that the Civil War is not about slavery, but about states' rights," he said. "They've called that the noble cause. That was a lie, a lie that...