Long story short. In a blog post, one of his election workers admits to dropping lit saying, in essence, it is OK to vote for Doyle and Van Hollen.
The money quote:
We targeted Doyle donors who were already likely to go to the polls.
That is illegal. Donor information is public for the purpose of disclosure only. It is illegal to use that for your own targeting and fund-raising.
I hope someone looks into this.