“Why some key races won't be decided on election night”

Key points

• Control of House and Senate may remain unclear on election night due to closeness.
• Experts say delays are normal, not evidence of fraud, as ballots are counted.
• Close races cause slower calls; media projection depends on counted ballots and margin.
• California may call some races quickly but others could take days or weeks.
• Mail ballots and signature verification slow counting, varying by state rules.