  We present spectroscopic measurements of the Rossiter-McLaughlin effect for
WASP-148b, the only known hot Jupiter with a nearby warm-Jupiter companion,
from the WIYN/NEID and Keck/HIRES instruments. This is one of the first
scientific results reported from the newly commissioned NEID spectrograph, as
well as the second obliquity constraint for a hot Jupiter system with a
close-in companion, after WASP-47. WASP-148b is consistent with being in
alignment with the sky-projected spin axis of the host star, with
$\lambda=-8^{\circ}.2^{{+8^{\circ}.7}}_{-9^{\circ}.7}$. The low obliquity
observed in the WASP-148 system is consistent with the orderly-alignment
configuration of most compact multi-planet systems around cool stars with
obliquity constraints, including our solar system, and may point to an early
history for these well-organized systems in which migration and accretion
occurred in isolation, with relatively little disturbance. By contrast,
previous results have indicated that high-mass and hot stars appear to more
commonly host a wide range of misaligned planets: not only single hot Jupiters,
but also compact systems with multiple super-Earths. We suggest that, to
account for the high rate of spin-orbit misalignments in both compact
multi-planet and isolated-hot-Jupiter systems orbiting high-mass and hot stars,
spin-orbit misalignments may be caused by distant giant planet perturbers,
which are most common around these stellar types.
