A new poll from the Siena Research Institute shows Democratic Rep. Scott Murphy trailing Republican challenger Chris Gibson by nine points in New York's 20th Congressional District race. This just a month after the same poll showed Murphy ahead by 17.

But then, Siena is the polling outfit that showed Republicans Carl Paladino and Rick Lazio in a dead heat just days before Paladino won New York's GOP gubernatorial primary by 24 percentage points last month.

So the new poll in the Murphy-Gibson race is probably best taken with a grain of salt.