While Mike McGinn appeared on the Mountain (albeit at a different time than he announced), Jan Drago waited eagerly on the sidelines, and the rest of the mayoral challengers remained fairly quiet, the incumbent finally had a good day. (The SDOT business must seem neverending to that campaign.) Greg Nickels announced the endorsements of six local unions today–the International Association of Machinists and Aerospace Workers Local 751, the United Food and Commercial Workers Local 21, The Washington State Council of County and City Employees (AFSCME Council 2), UNITE HERE Local 8, the Pacific Northwest Regional Council of Carpenters, and the Laborers Local 440. And tomorrow he’ll be announcing a partnership with local grocers to promote the use of reusable grocery bags and provide such bags to low-income families via food banks–a nice, uncontroversial notch to have in his belt when the vote on the bag ban comes up.Of course, for Nickels, every day his opponents don’t do much to close the giant fundraising gap is a good one. The exception, of course, is Joe Mallahan, who’s put himself on nearly even footing with the mayor, but who–snowstorm notwithstanding–seems thus far like a guy with money in search of ideas.