Ads from a GOP-linked PAC boosted Denise Powell's spending advantage as she won the Democratic nomination for a key swing seat. For more than a decade, Democrats have put out television ads, digital spots and mail pieces aiming to convince Republican primary voters to vote for GOP primary candidates they believed would be easy to defeat in a general election. In many cases, it has worked. Republicans are now giving the strategy a try. And on Tuesday night in Nebraska’s 2nd District, their