Maybe President Obama is getting a bit of a convention bounce after all.

The president's lead over Republican challenger Mitt Romney has expanded in three daily tracking polls since his convention ended in Charlotte on Thursday night.

The Gallup tracking poll has Obama up 49%-45%.

Reuters/Ipsos gives the president a 47%-43% lead.

And Scott Rasmussen has Obama ahead of Romney, 46%-44%.

"The bump is actually happening. I know there was some debate whether it would happen ... but it's here," said Ipsos pollster Julia Clark, reports Reuters.

Reports Rasmussen: "The president is enjoying a convention bounce that has been evident in the last two nights of tracking data. He led by 2 just before the Republican convention, so he has already erased the modest bounce Romney received from his party's celebration in Tampa."

The full impact of the Democratic convention is still being assessed.

"It's important to note that much of the data in these trackers was compiled before the key speeches at the Democratic convention," writes political analyst Taegan Goddard, including the one delivered by Obama on Thursday.

Obama aides had said they did not expect a convention bounce -- but they may have been bluffing.