Representative Anthony D. Weiner has told friends that he plans to resign his seat after coming under growing pressure from his Democratic colleagues to leave the House in the wake of revelations of his lewd online exchanges with women, said a person told of Mr. Weiner’s plans…

Mr. Weiner, a Democrat, came to the conclusion that he could no longer serve after having long discussions with his wife, Huma Abedin, when she returned home on Tuesday after traveling abroad with her boss, Secretary of State Hillary Rodham Clinton.