While Buck looked like he might pull away a few weeks ago, recent polls have shown a close contest, and Buck has had to deal with a couple gaffes and a perceived weakness on women's issues. The last PPP poll, from Oct. 23, showed Buck and Bennet tied at 47%.
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Meanwhile, The Denver Post reports that both parties are getting ready for the possibility of a recount.
The TPM Poll Average for this race shows Buck leading 48.2%-46.0%.