Democratic members of the Iowa Senate have elected Sen. Zach Wahls of Coralville to lead the Senate Democratic caucus. Also elected: Amanda Ragan of Mason City as Democratic Whip; and assistant leaders Nate Boulton of Des Moines, Bill Dotzler of Waterloo, Pam Jochum of Dubuque, Herman Quirmbach of Ames, and Jackie Smith of Sioux City.