012820 404 The Democratic Candidates are cutting a swath through Iowa in the last few days before the Feb. 3 rd presidential caucuses. Tomorrow, former Vice President Joe Biden will hold an event at Western Iowa Tech Community College. He will appear at the Rocklin Center at 1:15 p.m. A previous appearance by Biden earlier this month was canceled because of bad weather. Minnesota Senator Amy Klobuchar will be in town Thursday. On Friday morning, Massachusetts Senator Elizabeth Warren will hold a