` ` I ' n't let you down , '' Bennet said . Buck has yet to concede the nomination . `` I am humbled by your support , '' the Democratic incumbent told supporters in Denver . ` Bennet was running for a full term after his 2009 defeat .
` ` I ' n't let you down , '' Bennet said . Buck has yet to concede the nomination . Bennet was running for a full term after his 2009 defeat .