I guess is it official now, Rushern Baker (Prince George’s County Executive) is running for Governor. The photo above was retweeted from his Twitter account this morning.
His website is online:  http://rushernbaker.com/ and his social media accounts are listed on the website: Facebook and Twitter. He even has a Youtube channel with one video:

He has not filed with the State Board of Elections yet (but very few candidates have either).
So we now have Ross, Madaleno, Jealous and Baker so far. An announcement from Delaney is expected in the next week. I have not heard a timeline from Kamenetz, Gansler or other expected candidates in 2018.
Should be a very interesting election cycle over the next year.
Scott E