Hello,

First of all, I don't intend to discussion politics here in this thread I am creating as my questions are about the psychology/emotions of American audience to the speech of President Obama's.

I was watching the vedio about Obama Victory Speech 2012. And I couldn't understand why the audience cheered and applaused so frequently for every a few words, which seem to me that carry little meat. Here's an excerption.

I want to thank every American who participated in this election. (Cheers, applause.) Whether you voted for the very first time -- (cheers) -- or waited in line for a very long time -- (cheers) -- by the way, we have to fix that. (Cheers, applause.) Whether you pounded the pavement or picked up the phone -- (cheers, applause) -- whether you held an Obama sign or a Romney sign, you made your voice heard and you made a difference. (Cheers, applause.)
Could someone, I especially hope you're American, tell me why his supporters applaused or cheers on above words? I don't figure it out. Is that because cultural differences?

Many thanks!
It is typical during political speeches in which the public attends that the supporters cheer and applaud frequently. It is a way of expressing support for the politician. Sometimes it is also acknowledgment of the humor the politician is using. Sometimes the applause is for oneself and the other supporters who helped the politician get elected.

I want to thank every American who participated in this election. (Cheers, applause.)

This is acknowledging oneself and the other supporters.

Whether you voted for the very first time -- (cheers) --

The supporters who voted for him the 1st time are acknowledging themselves and each other.

or waited in line for a very long time -- (cheers)

Acknowledging his humor as well as acknowledging having waited in line a long time.

-- by the way, we have to fix that. (Cheers, applause.)

Acknowledging his humor.

Whether you pounded the pavement or picked up the phone -- (cheers, applause) --

Acknowledging oneself and fellow supporters.

whether you held an Obama sign or a Romney sign, you made your voice heard and you made a difference. (Cheers, applause.)

Acknowledging oneself and fellow supporters for making a difference.
Many thanks for your breakdown in details.

Have a great day!