DENVER (AP) -- Talk inside the Democratic convention may be about unity, but on the streets of Denver this week, one thing is getting ugly: the politics of getting tickets to see Barack Obama's acceptance speech.

Political watchers who've come to Denver hoping to score passes to Obama's historic speech are stepping up their appeals to find a way to see Thursday night's prime-time address in person.

The crowd of about 76,000 that sees Obama at Invesco Field at Mile High will be larger than 95 percent of the cities in Colorado.

But the stadium still isn't big enough to hold all the people who want to attend.

Democratic Party officials say they received more than 100,000 ticket requests within 48 hours of announcing that the speech would be at the Denver Broncos' football stadium.

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The stadium holds about 76,000 for a football game. Democratic officials won't say precisely how many will see Obama's speech live, citing security reasons.

They also say seating for the speech will be different than for a football game, because extra seats have been placed on the field while others behind the temporary stage have been cordoned off.

Obama's address will fall on the 45th anniversary of Dr. Martin Luther King Junior's "I Have a Dream" speech on the National Mall.

(Copyright 2008 by The Associated Press. All Rights Reserved.)