Annual campaign finance reports released this week indicate three fundraising leaders among potential Democratic candidates for Maryland governor: Lt. Gov. Anthony Brown (taking in $1.25 million), Attorney General Douglas Gansler ($1.24 million) and Howard County Exec. Ken Ulman ($1.14 million). A fourth potential candidate, Montgomery County Del. Heather Mazeur, collected $248,671 in 2012, leaving her with $380,000 in cash on hand. Donald F. Norris, professor and chairman of UMBC’s Department of Public Policy, told the Baltimore Sun that Ulman’s fundraising figures were particularly surprising, saying, “You would think the other candidates would be ahead of him, but he’s been out …