LAS VEGAS (AP) — First-term Democratic Congressman Ruben Kihuen (KEY'-win) of Nevada is denying allegations of sexual harassment but says he won't seek re-election. Kihuen's announcement Saturday follows the House Ethics Committee statement Friday that it had opened an investigation into allegations that he sexually harassed a former campaign aide and a lobbyist. Kihuen says he denies all the allegations and that he's committed to fully cooperating with the committee. A former campaign aide said Kihuen propositioned her despite her repeated rejections during his 2016 campaign.