Twitter mentions in the last 30 days: 1. Donald J. Trump (2.7 million) 2. Scott Walker (354,000) 3. Jeb Bush (310,000) 4. Ted Cruz (287,000) 5. Rand Paul (98,000) 6. Rick Perry (97,000) 7. Lindsey Graham (87,000) 8. Marco Rubio (74,000) 9. Mike Huckabee (73,000) 10. Chris Christie (67,000)