Simplify the following text for a Grade 10 native English-speaking person.
Original: Biden unsuccessfully sought the Democratic presidential nomination in 1988 and 2008 , both times dropping out early in the race . Barack Obama selected Biden to be the Democratic Party nominee for Vice President in the 2008 U.S. presidential election .
Simplified: Biden tried again to get the Democratic Party 's nomination in the 2008 presidential election .