Congressman Colin Allred tells TMZ Sports the U.S. is calling Brittney Griner "basically a political prisoner" now in Russia ... and says because of it, government officials have formally begun negotiations with the foreign country to bring the WNBA superstar home.
We spoke with the representative out on Capitol Hill on Tuesday afternoon -- just hours after it was announced that Griner's detention in Russia would be extended until at least July 2 -- and he confirmed to us they've officially entered into talks with Russian leaders to try to get Griner back on U.