Political strategists say they are struggling to find enough space on YouTube for ads as campaigns flood the service, with particular shortages in swing states (Mark Bergen/Bloomberg)

Mark Bergen / Bloomberg:
Political strategists say they are struggling to find enough space on YouTube for ads as campaigns flood the service, with particular shortages in swing states  —  - In some swing states, YouTube is entirely sold out of ad space  — Political advertisers see ‘crunch’ in final month of election