Last April, the US Department of Education prohibited discrimination against trans* students, adding in the protective article which says that «no person in the United States shall, on the basis of sex, be excluded from participation in, be denied the benefits of, or be subjected to discrimination under any education program or activity receiving federal financial assistance,» the gender identity concept.
Recently, during a Q&A session on Tumblr, the US president said he was in favor of this law: http://whitehouse.tumblr.com/post/88412719118/in-case-you-missed-it-president-obama-answers-your
Moreover, according to the White House, President Barack Obama apparently intends to sign an order prohibiting discrimination by federal contractors against employees based on their identity or sexual orientation.
This law was approved last year by the Senate, but the House had stopped its progression.
As explained by ABC News, while Obama lacks the authority to extend that protection to all Americans, the order being drafted by the White House would impact about 14 million workers whose employers or states currently do not ban workplace discrimination against gay, lesbian, bisexual and transgender individuals.