from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective obsolete
eggingon; raising quarrels(used in Devonshire at the turn of the 19th century)
Sorry, no etymologies found.
In fact, she has not aggressively campaigned there at all (at least compared to Edwards and Obama), as posted earlier during the week on TPM-EC (see: Report: Hillary L: agging in Iowa Visits)