Primary information for Democrats?

[Hometown]

I've been a registered Democrat in Tulsa for close to a year now and I have yet to receive one political mailing.  

The Tulsa World seems to have a propensity to report on Republicans while it nearly ignores Democrats.  

I don't know how Democrats are supposed to make informed decisions about who to vote for in the upcoming primary.

What is the best source of information on local Democratic candidates running in the primary?