Abby Finkenauer running for US Senate seat long held by Chuck Grassley
<img alt="" class="gnt_em_vp_img gnt_em_vp_img__yn" src="https://i.ytimg.com/vi/S6mLVy5Ga3Y/maxresdefault.jpg" onload="if(this.naturalWidthFormer Iowa congresswoman Abby Finkenauer on Thursday became…