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FROM CNN's Jack Cafferty:

Barack Obama is losing his lead over John McCain according to the latest polls. It is hardly an encouraging sign if your poll numbers are going down during the week you accept your party's nomination.

The latest CNN/Opinion Research Corporation poll shows Barack Obama in a dead heat with Republican John McCain. 47 percent of registered voters like Obama, and 47 percent like McCain. And this poll was conducted AFTER Obama announced Senator Joe Biden as his pick for Vice President.

The Obama campaign had hoped for a bounce from that announcement. No such luck. And so far it doesn't appear the Democratic National Convention is moving the needle either. For one day this week McCain actually topped Obama by two points in the Gallup Daily Tracking Poll. Today Obama is back up by one. Last month, Obama had a 7-point lead in CNN's poll.

Maybe those negative ads are working. Painting Barack Obama as an out-of-touch celebrity, grabbing headlines like Paris Hilton or Britney Spears or "The One" parting the Red Sea like Charlton Heston's Moses. Now, the McCain ads are using Joe Biden and Hillary Clinton's own words in commercials AGAINST Obama.

Remember that Clinton ad: "It's 3 a.m. and your children are safe and asleep. Who do you want answering the phone?" The McCain campaign is re-running a version of it in key battleground states with the announcer saying at the end, "Hillary was right."

Here’s my question to you: Have John McCain's attack ads changed your opinion of Barack Obama?

Tune in to the Situation Room at 5pm to see if Jack reads your answer on air.

And, we love to know where you’re writing from, so please include your city and state with your comment.