Washington ( CNN ) -- A top Colorado Democratic donor has had enough of Sen. Mark Udall 's campaign focus on women 's reproductive rights . As Udall ( D-Colo. ) delivered a line on the issue in his stump speech Sunday during the final hours of a tight campaign against Republican challenger Cory Gardner , a heckler interrupted by shouting : `` That 's not the only thing you stand for ! Jesus Christ ! '' An account of the exchange was detailed by The Guardian . According to the newspaper , Udall responded : `` I 'm sorry ? '' And then the man shouted again : `` That 's not the only thing you stand for ! '' The Guardian identified the heckler as Leo Beserra , who became a millionaire on Wall Street and for years has been a hefty donor to Colorado Democrats . He 's given at least $ 9,800 to Democrats this year alone . He 's far from the first person to criticize Udall 's campaign for its focus on the issue -- largely targeting Gardner 's previous support ( he reversed his stance this year ) for a `` personhood '' measure that would have had the effect of outlawing abortion . The issue could help Udall turn out votes among women , a key Democratic constituency , who live in Denver 's suburbs . They could be key in a neck-and-neck race : A Quinnipiac poll released Monday showed Gardner with a 45 % to 43 % lead over Udall . But the state 's largest newspaper , The Denver Post , called Udall 's campaign `` obnoxious '' in an editorial endorsing Gardner in the Senate race . `` Rather than run on his record , Udall 's campaign has devoted a shocking amount of energy and money trying to convince voters that Gardner seeks to outlaw birth control despite the congressman 's call for over-the-counter sales of contraceptives , '' the newspaper editorialized . `` Udall is trying to frighten voters rather than inspire them with a hopeful vision . His obnoxious one-issue campaign is an insult to those he seeks to convince . '' Udall 's campaign argued the idea that the campaign has focused solely on women 's reproductive rights is a `` misunderstanding . '' Udall spokesman Chris Harris said the campaign has aired TV ads on immigration reform , flood recovery , veterans ' affairs , the National Security Agency and more . He said on Monday , Udall was at a press conference with several other top Colorado Democratic officials on immigration reform . `` This campaign has focused on a wide range of issues . Those who imply otherwise are simply wrong , '' he said . Still , Harris defended the campaign 's efforts to highlight women 's reproductive rights , calling it an area of `` fundamental difference '' between Udall and Gardner . `` These are not simply social issues , as many people talk about , '' he said . `` They are fundamental issues of freedom that affect every single aspect of not just a woman 's but a family 's lives , be it economic , professional and personal . ''
Democratic incumbent Mo Udall has focused much of his campaign in Colorado on reproductive rights . A heckler shouted at a campaign rally : ` ` That 's not the only thing you stand for ! Jesus Christ ! '' It 's just the latest blow Udall has received for his intense focus on the issue .