Mark Gerald Elworth Jr. is an American freelance musician, businessman, cannabis rights activist, perennial candidate for public office, and rockhound. Elworth was the Libertarian Party candidate for Governor of Nebraska in 2014 and was the Legal Marijuana Now candidate for Vice President of the United States in 2016.

The Legal Marijuana Now Party (LMN) is a political third party in the United States. The party's platform includes abolishing the Drug Enforcement Administration and legalizing hemp and marijuana. As of 2024, the party has ballot access in Minnesota and Nebraska.