But Kasich and Walker face competitive re-elections; their national presence is spectral, their national potential speculative.
1718, "capable of seeing spectres;" 1815, "ghostly;" from spectre + -al (1). Meaning "pertaining to a spectrum" is 1832, from stem of spectrum + -al (1).
spectral spec·tral (spěk'trəl)adj. Of, relating to, or produced by a spectrum.