Platner energized Maine's Democrats. Jackson's challenge will be to keep them engaged

Democrats have a new candidate for U.S. Senate in Maine: Troy Jackson. In one of the country's most closely-watched races, he'll have less than 100 days to make his case.

<p>Democrats have a new candidate for U.S. Senate in Maine: Troy Jackson. In one of the country's most closely-watched races, he'll have less than 100 days to make his case.</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5902276' />