(CNN) - Gary Johnson, who announced this week he was withdrawing from the 2012 Republican race to seek the Libertarian presidential nomination, urged his Iowa supporters Saturday to back Ron Paul in Tuesday's caucuses.
Libertarians have long identified with Paul's views, which espouse limited American military involvement abroad and a reduced role for government at home.
In his letter to supporters, Johnson acknowledges his views and Paul's were not perfectly aligned.
"While Ron Paul and I are both libertarians, we don't necessarily agree on every single issue," Johnson wrote. "However, on the over-riding issues of restoring our economy by cutting out-of-control spending and the need to get back to Constitutional principles in our government, Ron Paul and I are in lock-step."
Johnson, who backed Paul for the 2008 Republican presidential nomination, noted that the viewpoints he shared with the Texas congressman were ultimately of greater importance that presidential politics.
"The cause of individual liberty and freedom is bigger and more important than any candidate or campaign," Johnson wrote. "I am hopeful that in urging my supporters in Iowa to vote for Ron Paul in the upcoming Caucuses, a victory for the principles we share can be won."
A former two-term governor of New Mexico, Johnson struggled to gain traction in the Republican race for the White House, though he did appear in two presidential debates in May and September.