(CNN) - Pennsylvania Sen. Bob Casey will announce his support of Barack Obama's White House bid Friday, an endorsement that could give the Illinois senator a boost in the crucial primary state that votes April 22.
The official endorsement is expected to come later Friday as Obama begins a week-long campaign-swing through the state. Several recent polls suggest Hillary Clinton appears to hold a double-digit lead there.
Casey is a first-term senator and son of a popular former governor of the state, Bob Casey, Sr. A prominent catholic, Casey's support could help Obama make inroads among catholic voters in the state - a voting bloc that has favored Clinton in most other primary contests.
In 2002, Casey lost a hard-fought gubernatorial primary contest against Pennsylvania Gov. Ed Rendell, now an ardent supporter of Hillary Clinton's White House bid.
– CNN Ticker Producer Alexander Mooney
Way to go Senator Casey. Obama '08
Please Hillary and Bill........ GO HOME!! Leave us all alone.
We need someone with the talents of Barak Obama.
He's not Electable!!!! Just a wasted effort.....
Welcome aboard .
Obama 08 !!!
YES WE CAN !!!
Yes PA, lets work hard and close the gap. This race should end after you...
Thanks Senator Casey! One more courageous party member standing up for the People's Choice! VOTE OBAMA 08!
keep em coming...the awakening has begun....woohoo
OH WOW, that is impressive....NOT!!
How many top Dems in Pennsylvania are backing Hillary!!
No one ever mentions Ed Rendell's role in helping Hillary raise funds for her Senatorial campaign, and particuloarly his involvement in the $2 million given by Peter Paul, who has an active lawsuit against Bill and Hillary claiming fraud, unjust enrichment, campaign finance violations and criminal conspiracy....in California's Federal Court.
With friends like Hillary I'm surprised Rendell is still a political force in Pennsylvania. Maybe this year will be the year PA voters WAKE UP and see Rendell, but more particularly Hillary, for the untrustworthy hacks that they are.
The party built by the Clintons is stronger then this. I think everyone remembers how before the Clintons we didn't have running water and the moon was made of cheese, and the Clintons changed that. See I too can be an excellent supporter of Hillary!!!!!
It is 3AM and the phone in the White House is ringing... Do you want someone who is "sleep deprived" because it is 3AM to answer the phone and misspeak?
Thank you Senator Casey. Let's hope it helps Senator Obama within your state.
I don't understand why Hillary is being arrogant about losing... if she was a true democrat she would drop out.
Also why are Hillary supporters saying they would vote for John McCain? I mean i am a huge Obama supporter and i don't like how HIllary has attacked him and his supporters, but if she somehow wins, i wouldn't turn my back on the democratic party and my beliefs... i would still vote for her... i just don't understand why Hillary supporters say they would vote for McCain... you are only hurting yourself and being selfish... Obama and Hillary are similar in policies...
If you are going to vote for McCain just becuase your canidate doesn't win the nomination, i think you are really voting for the wrong reasons.
Thank you very much Senator Casey.
This is Dem leadership members starting to line up to end this. But Clinton is holding out so hard, the concession speech is going to be even more delicious then expected.
Thanks CNN for allowing people to voice their comments.
Great news that another prominant politician is endorcing BARACK OBAMA! No matter how HRC supporters continue to prolonge this race, Americans continue to vote for the canidate that will change the old idealogy that continues to hamper this great country!
Go Barack Obama 2008!
A proud Alabama Supporter
Thank you, Senator Casey! Very wise and educated move!
Great news! Congrats again Sen. Obama. You are doing great. God bless you!
CNN, how come you all remove about 75% of all positive comments about Hillary???
Has to be a man with no balls running these comments boards. Typical Obama supporter...can't stand the thought of a woman in the white house.
Senator Obama has stated today that had his pastor not been retiring this year and had he not been willing to acknowledge his remarks as inappropriate, then certainly he would have left his church. Unbelievable. Whatever your opinion of the Obama-Wright controversy, does any impartial observer imagine for even a moment that Mr. Obama is speaking truthfully? He was a member of the church for twenty years and now he has suddenly had a conversion of conscience!? And this has had nothing to do with the political fallout? Simply unbelievable.
I hope his endorcement awakens the voters in PA!
Go Barack Obama 2008
Whats fascinating here is that Casey I believe is a pro-life democrat and is backing the so called most liberal senator in the country. Great minds rise above and come together for the good of the people. Are you listening Hillary?
Oh, Wow! Another mislead, misinformed, stupid, get on the band wagon Politician.
He needs his support otherwise Hillary is going to win by a landslide.
It's hard to see someone win when we do not know much about him. Obama is a typical politician like they all are. Some people are just so fooled by his speeches. We need someone who is going to get this economy back on track and restore the reputation of our country around the world . She is a heavyweight champion and she is the type of person that gets things done. Can somebody out there tell me what Obama has accomplished for this country in the short time he's been a senator? Maybe,you can convince me that he is really the one for this job.