Question: Former New Mexico Governor Gary Johnson and former Massachusetts Governor Bill Weld were the mominees for Libertarian Party presidential primaries, 2016; When was the last time a presidential ticket consisted of two state governors? 

Context paragraphs:
Libertarian Party presidential primaries, 2016: The 2016 Libertarian Party presidential primaries and caucuses allowed electors to indicate non-binding preferences for the Libertarian Party's presidential candidate.  These differed from the Republican or Democratic presidential primaries and caucuses in that they did not appoint delegates to represent a candidate at the party's convention to select the party's nominee for the United States presidential election.  The party's nominee for the 2016 presidential election was chosen directly by registered delegates at the 2016 Libertarian National Convention, which ran from May 26 to 30, 2016.  The delegates nominated former New Mexico Governor Gary Johnson and former Massachusetts Governor Bill Weld.

2012 Libertarian National Convention: The 2012 United States Libertarian National Convention, in which delegates of the Libertarian Party (LP) chose the party's nominees for President of the United States and Vice President of the United States in the 2012 general election, was held May 2–6, 2012 in Las Vegas, Nevada at the Red Rock Resort Spa and Casino.  Former Governor of New Mexico Gary Johnson won the presidential nomination on the first ballot.  Retired California state court judge Jim Gray won the vice-presidential nomination, also on the first ballot.  The convention also chose to replace most of the Libertarian National Committee party officers and members-at-large.

Gary Johnson presidential campaign, 2016: The 2016 presidential campaign of Gary Johnson, the 29th Governor of New Mexico, was announced on January 6, 2016, for the nomination of the Libertarian Party for President of the United States.  He officially won the nomination on May 29, 2016, at the Libertarian National Convention in Orlando, Florida, receiving 56% of the vote.  Former Massachusetts Governor William Weld was endorsed by Johnson for the Libertarian vice-presidential nomination, which he also received on May 29, 2016.

Walter Dwight Bradley: Walter Dwight Bradley (born October 30, 1946) was the 27th Lieutenant Governor of the U.S. state of New Mexico, serving under Governor Gary Johnson from 1995 through 2003.  Walter Bradley previously served in the New Mexico State Senate before being elected lieutenant governor.  Bradley was preceded as lieutenant governor by Casey Luna and succeeded by Diane Denish.  Bradley ran for Governor of New Mexico in 2002, but was defeated in the Republican primary by state Representative John Sanchez, who lost the general election to Bill Richardson.

Political positions of Gary Johnson: Gary Johnson was the governor of New Mexico from 1995 to 2003 and ran for president in 2012 and 2016.  In December 2011 he announced he would pursue the presidential nomination of the Libertarian Party for the 2012 general election.  The Libertarian National Convention in May, 2012 chose Johnson as the party's candidate.  In November 2014, Johnson announced he would pursue the presidential nomination of the Libertarian Party for the 2016 general election.  Johnson has taken positions on many political issues as revealed through his public comments, his gubernatorial record, his Our America Initiative and his campaigns to win the Republican and Libertarian nominations.

United States presidential election in Utah, 2012: The 2012 United States presidential election in Utah took place on November 6, 2012 as part of the 2012 General Election in which all 50 states plus The District of Columbia participated.  Utah voters chose six electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate, Vice President Joe Biden, against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate, Congressman Paul Ryan.  Prior to the election, all 17 news organizations considered this a state Romney would win, or otherwise considered as a safe red state.  Utah is among the most heavily Republican states, voting for the Republican ticket in every presidential election since 1968, and is also the only state to have a majority Mormon population, benefiting Romney, the first Mormon to head a major party presidential ticket.  He carried every county in the state, all by large margins.  However, Obama would go on to win reelection nationwide.

Austin Petersen: Austin Wade Petersen (born February 19, 1981) is an American producer, writer, political activist, and commentator.  He was the runner-up for the Libertarian Party's nomination for President of the United States in 2016, finishing second place to former governor Gary Johnson with 21% of the vote.

Gary Johnson presidential campaign, 2012: The 2012 presidential campaign of Gary Johnson, the 29th Governor of New Mexico, was announced on April 21, 2011.  He declared his candidacy for the 2012 Republican Party nomination for President of the United States.  On December 28, 2011, Johnson withdrew his candidacy for the Republican nomination, and declared his candidacy for the 2012 presidential nomination of the Libertarian Party.  The 2012 Libertarian National Convention was held during the first weekend of May 2012.  On May 5, 2012, after promoting his libertarian-oriented political positions to delegates, Johnson received the most votes at the convention and became the official 2012 Libertarian presidential nominee.  On November 6, 2012, Johnson received just under 1% of the popular vote in the general election, amounting to more than 1.2 million votes, more than double what the Barr/Root ticket received in 2008.  This was the most successful result for a third-party presidential candidacy since 2000, and the best in the Libertarian Party's history by vote number at the time.  (Johnson ran again in 2016 and received nearly four times his 2012 vote total.)

Bill Weld: William Floyd Weld (born July 31, 1945) is an American attorney, businessman, and politician who was the 68th Governor of Massachusetts from 1991 to 1997.  He was the Libertarian Party's nominee for Vice President of the United States in the 2016 election, sharing the ticket with Gary Johnson.  Johnson and Weld were together the first presidential ticket since 1948 to consist of two state governors.

Gloria Cordes Larson: Gloria Cordes Larson is a prominent lawyer, public policy expert, and business leader.  Larson was named president of Bentley University in 2007.  She is the seventh president of Bentley University and the first woman to hold the post.  Prior to joining Bentley, Larson served as secretary of consumer affairs and business regulation from 1991 to 1993, under former Massachusetts Governor William Weld and led a business advisory council for former Massachusetts Governor Deval Patrick.

Supporting paragraphs: Libertarian Party presidential primaries, 2016 Bill Weld
Answer: 1948