Biden's son faces investigation over taxes as Trump joins Texas lawsuit that aims to overturn election

President-elect Joe Biden's son Hunter Biden is facing a federal investigation into his tax records. Meanwhile, President Trump is focusing on overturning the election, joining a lawsuit brought to the Supreme Court by Texas' attorney general that seeks to invalidate ballots from four battleground states won by the president-elect. CBS News political correspondent Ed O'Keefe reports on the latest on the presidential transition, and CBS News' Rebecca Kaplan joined CBSN from Wilmington, Delaware, to discuss.