Because John McCainJohn Sidney McCainJeffries blasts Trump for attack on Thunberg at impeachment hearing Live coverage: House Judiciary to vote on impeachment after surprise delay Budowsky: Would John McCain back impeachment? MORE compares his call for more troops in Afghanistan to the surge in Iraq, he's likely to get more credit than Barack ObamaBarack Hussein ObamaModerate or left of center — which is better for Democrats in 2020? Obama: Countries facing severe effects of climate change offer 'moral call to rest of the world' Democrats' self-inflicted diversity vulnerability MORE, the candidate who first called for sending more U.S. troops there, writes Dayo Olopade. Barack Obama is maintaining structural advantages in the electoral math, according to recent state polls that show him ahead in swing states Iowa, Minnesota and Colorado and barely behind McCain in red states South Carolina, South Dakota and North Carolina, according to poll guru Nate Silver.