Three Iowa mayors are in Washington, D.C., for the 87th annual U.S. Conference of Mayors, reports Radio Iowa. More than 250 mayors are attending the three-day conference, some of whom voiced concerns for furloughed federal employees during the partial government shutdown. “The responses I’ve heard from some other mayors was basically about the trickle-down effects if the shutdown continues, that it could basically lead to a recession, a downturn in the economy, that kind of thing,” said Iowa City Mayor Jim Throgmorton.