Sarah Palin’s performance in the vice presidential debate did have an affect on undecided voters — just not the one the McCain campaign had expected or hoped for. The McClatchy/Ipsos poll found:

If they had to vote immediately after watching the debate between Republican Palin and the Democratic vice presidential candidate, Sen. Joe Biden of Delaware, 52 percent of the 456 undecided voters who were surveyed would vote the Obama/Biden ticket, the poll found.

It also found that Palin’s performance in the debate did nothing to clinch undecided votes for her running mate, Arizona Sen. John McCain. Before the debate, those same undecided voters were leaning 56 percent to 44 percent for McCain. The day after the debate, the numbers tilted 52 percent to 48 percent for Illinois Sen. Barack Obama.