If you're going to make up poll findings, why stop at one? Here's another from Fox Nation:

That links to this Las Vegas Review-Journal article:

POLL: Obama's visit just bounced off Reid

Poll shows senator gained little ground in re-election battle

Gee, “gained little ground” doesn't sound like Obama's visit hurt Reid, does it? There's more:

But as Reid faces an uphill path to win re-election to a fifth Senate term, Obama's enthusiastic endorsement does not appear to have improved the Senate majority leader's standing among constituents, according to a new poll conducted for the Las Vegas Review-Journal.

Reid got no bounce from Obama's visit on Feb. 19, when the president spoke highly of him at Green Valley High School and to business leaders at CityCenter, polling indicates.

...

“Reid was not helped, and Obama was not any more popular than he was before he came to the state,” said Brad Coker, managing director at Mason-Dixon Polling & Research.

Obama's day in Vegas “did not have much of an effect” on Reid's re-election chances, notably among independent voters, Coker said.

So Fox Nation's evidence that a poll has found that Obama's visit to Nevada “hurt” Harry Reid is an article in which a pollster said Obama's visit “did not have much of an effect” on Reid.