  We present a detailed study of the low temperature and high magnetic field
phases in the chemical substitution series URu$_2$Si$_{2-x}$P$_x$ using
electrical transport and magnetization in pulsed magnetic fields up to 65T.
Within the hidden order region (0 $\ x$$\ $ 0.035) the high field ordering is
robust even as the hidden order temperature is suppressed. Earlier work shows
that for 0.035 $\ x$ $\ $ 0.26 there is a Kondo lattice with a no-ordered state
that is replaced by antiferromagnetism for 0.26 $\ x$ 0.5. We observe a
simplified continuation of the high field ordering in the no-order $x$-region
and an enhancement of the high field state upon the destruction of the
antiferromagnetism with magnetic field. These results closely resemble what is
seen for URu$_{2-x}$Rh$_x$Si$_2$\footnote{The concentration in this paper is
defined as URu$_{2-x}$Rh$_x$Si$_2$ while the chemical formula in the literature
is given as U(Ru$_{1-x}$Rh$_x$)$_2$Si$_2$ [24-26]}, from which we infer that
charge tuning uniformly controls the ground state of URu$_2$Si$_2$, regardless
of whether s/p or d-electrons are replaced. This provides guidance for
determining the specific factors that lead to hidden order versus magnetism in
this family of materials.
