Here's why flags are flying at half-staff, and why President-elect Donald Trump isn't thrilled with the decision.

Although the U.S. flag is at half-staff to mark the death of President Jimmy Carter, 8 Republican-led states will raise flags for Trump's inauguration

Gavin Newsom has directed California officials to temporarily raise the state capitol U.S. flag to full staff on inauguration day, in honor of Donald Trump. The height of U.S. flags has become a political touchpoint after the death of Jimmy Carter in December.