Simplify the following text for a Grade 7 native English-speaking person.
Original: Dmitry Anatolyevich Medvedev is the President of Russia , officially on May 7 , 2008 . He won the presidential election held on March 2 , 2008 with about 70 % of the vote .
Simplified: He won the presidential election held on 2 March 2008 with 71.25 % of the popular vote , and was inaugurated on 7 May 2008 .