Tomorrow will be a year to the day that Barack Obama was elected president of these United States.

With all that has happened since then, it's getting harder to remember the headiness of that time -- whether Democratic or Republican or Independent, you can't dispute the historic nature of the 2008 election.

HBO's "By the People: The Election of Barack Obama" (9 tonight) reminds us not just of election day, but President Obama's journey to his victory. And even if the memories and the emotions linger, you'll still learn something.