They are at the point of becoming meaningful, like a British political debate. Up until recently they were like a roller derby match. With Trump, Cruz and Kasich on stage, you have three very differ styles and potentially more room for substance. Kasich needs to press the issues he raised in Ohio and actually engage with Trump and Cruz. Both Trump opponents have to press Trump negatives. The numbers show that Trump is both unpopular and well-known among his non-supporters. Even Clinton shows better.
Yes, but the negatives don’t matter
People are not voting for Trump because they like him
They are voting for him because he is right
That is why the GOPe, DNC, MSM, etc don’t understand Trump and you to some extent as well.