In a statement issued late Thursday, Berkley said that Weiner has "severely compromised his ability to be an effective leader" with behavior that she described as "inexcusable." But noting that in "a similar situation" she withheld calling for the resignation of former Sen. John Ensign, the Nevada Republican whose seat she and Heller are vying for, she stopped short of calling for Weiner to step down. "Anthony Weiner cannot escape the fact that his irresponsible behavior, and the lies he told, are indefensible and have done great harm on many levels," Berkley said. "That is why I strongly support the House Ethics Committee investigating whether he violated his oath of office." That was the stand taken by another Democratic Senate candidate running in a battleground state is Rep. Martin Heinrich, D-N.M., who is running for the seat of retiring Sen. Jeff Bingaman, D-N.M. "Rep. Heinrich supports the call for an ethics investigation to determine whether any official resources were used or any other violation of House rules occurred, and believes it's up to the constituents in Rep. Weiner's district to determine whether he should resign," said Heinrich spokesperson John Blair.