I think all the main candidates have issues.  

Hillary, problem with independents, moderates, republican.  But, she is counting on low informed women to put her over the top, with the latino and AA vote.

Barack, problem with low informed women, main stream democrats.  But he is courting college educated, college bound, youth and independents.

John, problem with the AA and latino vote.

While we have only been looking at one poll, well I have, for these negatives, per Rassmussen, it is a problem.  Obama's negatives are primarily from the "unknown factor".  Now, once people are informed about him, the negs will either go up or down.  Hillary's negatives are primarily from the "known factor".  People know her, period.  People have made their minds up about her, period.  Her push is from people who only know her by the last name of "Clinton".  Will that last?  We don't know.  That is up to Obama and Edwards to fix.  Edwards is the best candidate across the board with the "least negative factor", but he lacks the charisma of Obama and the strong name recognition of Clinton.

Now, the negatives.  Hillary is pushing it with 50% and it is not good for a candidate to be there at this juncture.  It would be one thing if she was an "anamoly", but she it not.  So, brace for the numbers to go up as the campaign, goes on.  Obama is in the grey area.  People still do not know much about him, except his name.  Now, as people get to know him and his positions.  It will either be up or down in the negative department.  Again, Edwards is the best in this department over the board.

Strategy.  Clinton is going for the low uninformed woman vote, coupled with the latino and AA vote to push her over.  She is not going to court moderates, independents, republicans.  She knows the polling and they are more than likely not going to shift.  Is this smart?  Yes, but as in Obama, this group of uninformed women, need to turn out to vote, more importantly they need to be registered.  This is a large untapped market, if successful Clinton can win over the GE Republican.  But again, they need to vote.  Obama is going for the independents, Republicans, AA, youth, and some dems.  Is this smart?  Yes, but as with Clinton, the youth vote need to come out strong and also need to register to vote.  This is a large segment, that has been growing over the past two election cycles, primarily over the war in Iraq.  Obama, need to solidify the AA base and bring more women to his side, if he can he too, can win over the GE Republican.  Edwards, has the mainstream democrat, some indies, and some youth vote.  For him, he need to concentrate more on women and AA, for him to stay in the game.

Once last tidbit.  I read that Clinton is not worried about the fundraising of Barack Obama, that it means "nothing".  I did find that somewhat humerous, because if anything he has been giving her a run for her money.  If she want to totally take him out, she needs to dry up his purse strings.  Again, money is 50% of any campaign, don't fool yourself.  These campaigns can not function WITHOUT money.  If he raises more than 30M, that does speak volumes.  Somebody is donating to him, and I am sure Clinton and Edwards would like to know WHO?