Johnson ran again for President in 2016, once again winning the Libertarian nomination and naming former Republican Governor of Massachusetts Bill Weld as his running mate. Johnson received nearly 4.5 million votes (3.3% of the total vote), which is the most for a third-party presidential candidate since 1996 and the highest national vote share for a Libertarian candidate in history. After the 2016 presidential election, Johnson said he would not run for president again. He ran for the U.S. Senate as a Libertarian in the 2018 New Mexico senate race against incumbent Democratic senator Martin Heinrich, coming third with 15.4% of the statewide vote (107,201 votes).