Why Janet Mills is trending

<p>The Maine Governor suspended her Senate campaign, clearing the path for Democrat Graham Platner to challenge Republican Sen. Susan Collins in November. CNN's Arlette Saenz explains why the race is so crucial for Democrats' hopes of winning the Senate. Discover more videos, including live streams and exclusive storytelling, on our <a href="https://www.cnn.com/watch">Watch</a> page.</p>