Most of you are familiar with the RIGHT wing of that party. THe ECONOMIC LIBERTARIANS. Yes, Ron Paul is a fellow traveller. No regulations and the market will take care of all is a common mantra.
Now the LEFT of that party are mostly the CIVIL LIBERTARIANS... we have plenty of those and they are concerned mostly with civil liberties. For the record, the CIVIL LIBERTARIANS do hail from traditional 19th century Liberalism... for the record. Yes, a few heroes of classic liberalism would find themselves in agreement with these guys and gals.
Notice that she contrasts civil and economic libertarians - claiming the latter as the inheritors of the 19th century (i.e., classical) liberal tradition...by subtle allusion trying to imply that they're connected with modern liberalism. In doing so, she fails to note the shift which took place early in the 20th century (1910s and '20s in the U.K., I'd guess about the same time in the U.S. but not being nadin I don't state as fact what I know nothing about) with the rise of what was then called 'new liberalism' which was essentially inversion of the traditional beliefs in liberty.
Economic and civil libertarians are both inheritors of the classical liberal position - the opposite of this point of view is modern-day liberalism which is little different from socialism.