ALEXANDRA JAFFE
Associated Press
DES MOINES, Iowa (AP) — Rougher shoving and sharper jabs are expected as a tighter field of Democrats takes the stage for Tuesday night's final debate before Iowa's leadoff presidential caucuses.
Just six candidates are gathering in Des Moines, all anxious for a televised boost before the Feb. 3 caucuses that could give one or more of them momentum for the primaries that will then come hot and heavy. Or the Iowa results could all but end their White House hopes.
State polling shows Iowans' preferences too close to call.
Some of the fiercest clashes could center on Sens. Bernie Sanders of Vermont and Elizabeth Warren of Massachusetts, fellow progressives who until now have largely avoided criticizing each other.
Warren chastised Sanders over the wee
