Obama likely to seek an active role in Senate , former aides say . McCain could position himself as a powerful ally of the McCain administration . Republican face slimmest minority in Senate in January . It 's unclear just how much political capital McCain has left in South Carolina .
John McCain likely to seek an active role in Senate , former aides say . McCain could position himself as a powerful ally of the Obama administration . Republicans face slimmest minority in Senate in nearly three decades . It 's unclear just how much political capital McCain has left in Washington .