With just weeks left in the contentious midterm election campaign, candidates in a trio of highly-competitive Senate races debated Thursday night, clashing over the economy, tariffs, the Iran war and abortion rights, with control of the upper chamber at stake.In Georgia, incumbent Democratic senator Jon Ossoff faced GOP representative Mike Collins. In Michigan, Democrat Abdul Al-Sayed and Republican Mike Rogers debated over the state’s open Senate seat. And in Maine, longtime senator Susan Collins met Democratic challenger Troy Jackson. Democrats need to flip four Republican-held Senate seats to win the majority.Here are the key takeaways from the battleground state debates.1....