FILE - This Oct. 10, 2016 file photo taken from a video screen grab shows then-Libertarian presidential candidate and former New Mexico Gov. Gary Johnson being interviewed in Santa Fe, N.M. Former Libertarian presidential candidate Gary Johnson is campaigning to unseat New Mexico's junior Democratic U.S. senator, seeking political opportunity in the space between Democrats and voters loyal to President Donald Trump. Johnson's name appeared Tuesday, Aug. 14, 2018, on the state's list of Senate candidates. Johnson still holds a vaunted place in New Mexico politics as a former two-term governor. (AP Photo/Russell Contreras, File)

ALBUQUERQUE, N.M. | Former Libertarian presidential candidate Gary Johnson is expected to give details about why he’s jumping in a race to unseat New Mexico’s junior U.S. senator.

Johnson, who served two terms as governor, is scheduled Thursday to speak to reporters in Albuquerque on his decision to join the race and how he would represent a state dependent on three military bases and two national labs.

FILE – This Oct. 10, 2016 file photo taken from a video screen grab shows then-Libertarian presidential candidate and former New Mexico Gov. Gary Johnson being interviewed in Santa Fe, N.M. Former Libertarian presidential candidate Gary Johnson is campaigning to unseat New Mexico’s junior Democratic U.S. senator, seeking political opportunity in the space between Democrats and voters loyal to President Donald Trump. Johnson’s name appeared Tuesday, Aug. 14, 2018, on the state’s list of Senate candidates. Johnson still holds a vaunted place in New Mexico politics as a former two-term governor. (AP Photo/Russell Contreras, File)
FILE – This Oct. 10, 2016 file photo taken from a video screen grab shows then-Libertarian presidential candidate and former New Mexico Gov. Gary Johnson being interviewed in Santa Fe, N.M. Former Libertarian presidential candidate Gary Johnson is campaigning to unseat New Mexico’s junior Democratic U.S. senator, seeking political opportunity in the space between Democrats and voters loyal to President Donald Trump. Johnson’s name appeared Tuesday, Aug. 14, 2018, on the state’s list of Senate candidates. Johnson still holds a vaunted place in New Mexico politics as a former two-term governor. (AP Photo/Russell Contreras, File)

Democrats saw his most recent presidential run, with currents of social liberalism, as a bane to their party.

Elected and re-elected governor as a Republican, Johnson stayed true to a small-government philosophy while vetoing more than 700 bills.

His open advocacy for legalized marijuana broke mainstream 1990s political taboos and made him a national curiosity.