AMES, Iowa (AP) — Iowa Democrats say they want to vote in Tuesday’s U.S. Senate primary for the candidate who gives the party its best chance to flip a Republican-held seat in November. Some just haven’t decided which of the two state lawmakers in the race fits the bill. “I am having a lot of trouble,” said Mike Lazere, a 65-year-old Democrat who always votes on Election Day. State Rep. Josh Turek and state Sen. Zach Wahls are seeking the nomination for the seat held by retiring Sen. Joni Ernst