The Democratic National Committee has raised more than $16 million in September, its best fundraising month in a congressional election cycle that has proved to be challenging for Democrats in every way but financially. That's $6 million more than the Republican National Committee raised in September. With Election Day four weeks away, party spokesman Brad Woodhouse said the new fundraising numbers suggest a growing enthusiasm among Democrats. That's an emerging argument from party strategists who are eager to counter polls that portray Republican voters as more energized and eager to vote in this election. [...] American Crossroads and Crossroads GPS,...