CLEAN : Polls open in Maryland US presidential primary

The speaker reflects on their excitement for Barack Obama in past elections compared to current candidates, expressing doubt about Trump securing enough delegates before the convention. They hope the decision will be made on the convention floor, as they do not support Trump. The speaker believes Cruz has more national support than Kasich and considers Cruz to be the most effective candidate.

According to the speaker, which candidate understands her agenda the most?

What role does the speaker believe the candidate mentioned will be most effective in?