Lowry has shown himself to be over-the-top GOPe. His interest is in discrediting all candidates that are not GOPe so that there is nothing left but Bush, Rubio or Kasich.
People working for organizations like the National Review are even more dependent on the GOPe/RINO donor class than GOP pols are. GOP pols at least get their salaries and pensions from taxpayers.
They likes of Lowry get every penny from their donors.