The Ninth Circuit has determined that solicitation of transportation of an explosive in interstate commerce with intent that the explosive kill, injure, or intimidate another person or damage property constitutes the attempted use of violent force.
“In this case, we conclude that someone who solicits a violation of § 844(d) categorically solicits the attempted use of physical force: transporting or receiving an explosive with the knowledge or intent that it will be used to kill, injure, or intimidate any person, or damage property, is categorically a substantial step toward the use of violent force.”
The full text of US v. Linehan can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2022/12/22/21-50206.pdf