By Thomas Neumann The WNBA star, who has been detained since February, wrote an emotional letter for help to the president. View the original article to see embedded media. WNBA star Brittney Griner, who has been detained in Russia since February, has written a letter to president Joe Biden directly appealing for his assistance in procuring her release. Excerpts of her emotional message to the president were shared via Twitter on Monday by ESPN’s T.J. Quinn. Griner wrote, “As I sit here in a Russian prison, alone with my thoughts and without the protection of my wife, family, friends, Olympic …