Usually “revolving door” connotes a transition from a stint as a public official into one as a corporate lobbyist or vice versa.
In the case of Red Wing, MN - a southeastern Minnesota town of 16,459 located along the Mississippi River - its Mayor Dennis Egan actually obtained a gig as head lobbyist for the frac sand industry trade group Minnesota Industrial Sand Council while serving as the city's Mayor. The controversy that unfolded after this was exposed has motivated Egan to resign as Red Wing's Mayor, effective April 1.
Without the fine-grained silica frac sand found within “Sand Land” (or manufactured ceramnic proppants resembling it), there is no hydraulic fracturing (“fracking”) for the oil and gas embedded within shale rock deposits. In other words, frac sand mining is the “cradle” while burning gas for home-heating and other purposes is the “grave.”
Egan is also the former head of Red Wing's Chamber of Commerce and the public relations firm he runs, Egan Public Affairs, is a Chamber member both at the Red Wing- and state-level. One of his other lobbying clients is Altria, which Big Tobacco's Phillip Morris renamed itself in Feb. 2003 during its rebranding process with the help of PR powerhouse, Burson-Marsteller.