Demonstrators protest before the inauguration of President-elect Donald Opinion: A tale of two crowds in one city

Two big and passionate crowds have descended on Washington -- one thrilled by Donald Trump's inauguration, the other appalled. Never in my lifetime has a new president been anticipated with such raw enthusiasm on one side and such fear and loathing on the other.

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President-elect Donald Trump waves as he walks to Photos: Trump's inauguration ceremonies

See photos of Donald Trump's inauguration ceremonies on the steps of the Capitol.

Anthony Messina, 33, of Brooklyn, says he voted Behind the scenes: What you won't see on TV

See how Washington is preparing for the president-elect's swearing-in ceremony.

Here is a 360-degree look at members of A 360 look from the Capitol

Get a 360-degree view of members of Congress arriving for the inauguration.