People bring up Sanders' low name recognition like he's automatically going to be viewed more favorably as his name rec. increases. Most of the people who are undecided about him are conservatives and moderates, while Liberals have mostly already made up their minds about him.
Uh, I assure you that many Republicans WANT Clinton to be the nominee.
Sorry, I was referring to PPP's cross tabs (though now I see I didn't mention my source), which show that Moderates and Conservatives have high undecideds with regards to Sanders' favorability.
Most of the people who aren't familiar with Sanders are Moderates and Conservatives, which means he's going to have a hard time keeping his breakeven favorability rating.
Not that Clinton's favorables are anything to be proud of. But Clinton doing poorly isn't a reason to hold Sanders up as the 'electable candidate', he's not.