The last three Libertarian candidates for President are:
2016 former Republican Governor of New Mexico, Gary Johnson
2012 former Republican Governor of New Mexico, Gary Johnson
2008 former GOP House member and Clinton prosecutor Bobb Barr
Gary Johnson ran as both a Republican and a Libertarian in 2008. Republican Ron Paul has run as a Libertarian.
On the evidence, the Libertarian Party is a flag of convenience for Republicans.
On the evidence, the Libertarian Party is a flag of convenience for Republicans.