The National Republican Congressional Committee is spending $50,000 on YouTube ads aimed using just-launched congressional district targeting from Google. The video ads push an economic message out to key districts in California, Iowa, Maine, Ohio, and West Virginia. It's not the first time nor will it be the last that a digital media firm will say it can target by district. However, Google continues to command a large chunk of online ad dollars spent by political advertisers up and down the ballot and the enhancement seems to be among the truer forms of district targeting. The NRCC YouTube video spots launched yesterday and are aimed at West Virginia's and California's third districts, Iowa's first, Maine's second,…