The release of Trevor R. Reed, a former Marine, as part of a prisoner exchange with Russia on Wednesday brought fresh attention to the cases of other Americans who are still detained in Russia, including the W.N.B.A. star Brittney Griner and another former Marine, Paul Whelan. In a briefing to reporters on Wednesday,
American officials said that the administration remained focused on the release of Ms. Griner and Mr. Whelan. But some observers noticed that in a statement after Mr. Reed’s release, President Biden had mentioned Mr. Whelan but not Ms. Griner.