House Democrats forced to make tough choices with limited midterm cash

House Democrats' main super PAC is winding down its spending in several races where the party has struggled to make headway despite national trends working in their favor.Why it matters: Democrats' ambitions of winning heavily Republican districts are running into the reality of finite resources at the end of a long and expensive midterm campaign.The Democratic Congressional Campaign Committee and its corresponding super PAC, House Majority PAC, have struggled to keep pace with their GOP counterparts' monster fundraising this cycle.Republicans also have the bonus advantage of a network of cash