Post-convention polls continue to roll in, and most are good news for President Obama -- though Mitt Romney can take heart from at least one of them.

A Washington Post/ABC News poll gives Obama only a 49%-48% lead over Romney among likely voters, effectively a statistical tie -- pretty much the situation that existed before the Republican and Democratic conventions over the past two weeks.

A new CNN/ORC International Poll, meanwhile, gives Obama a 52%-46% lead among likely voters, reflecting a bounce from last week's Democratic convention in Charlotte. The CNN poll had the candidates tied at 48% before the convention.

"The Democratic convention was fairly well received, particularly in comparison to the GOP meeting the previous week in Tampa," said CNN polling director Keating Holland.

As we noted yesterday, both the Gallup and Rasmussen daily tracking polls give Obama 5-point leads over Romney.

The Post reported that its poll also gave Obama a 6-point lead among registered voters, though presumably not all of them will show up to vote on Nov. 6.

Romney aides say these polls reflect a post-convention "sugar high" for Obama that will soon dissipate.

The Post/ABC News poll includes information that may back up that view.

"Obama has a six-point edge among all voters based on interviews Friday, the day after the Democratic convention wrapped up," the Post reported in its poll story. "In interviews Saturday and Sunday, the two were about evenly matched among registered voters."

Obama aides say they also expect a close race, but feel good about the new numbers.