  Light-front (LF) quantization in light-cone (LC) gauge is used to construct a
unitary and simultaneously renormalizable theory of the Standard Model. The
framework derived earlier for QCD is extended to the Glashow, Weinberg, and
Salam (GWS) model of electroweak interaction theory. The Lorentz condition is
automatically satisfied in LF-quantized QCD in the LC gauge for the free
massless gauge field. In the GWS model, with the spontaneous symmetry breaking
present, we find that the 't Hooft condition accompanies the LC gauge condition
corresponding to the massive vector boson. The two transverse polarization
vectors for the massive vector boson may be chosen to be the same as found in
QCD. The non-transverse and linearly independent third polarization vector is
found to be parallel to the gauge direction. The corresponding sum over
polarizations in the Standard model, indicated by $K_{\mu\nu}(k),$ has several
simplifying properties similar to the polarization sum $D_{\mu\nu}(k)$ in QCD.
The framework is ghost-free, and the interaction Hamiltonian of electroweak
theory can be expressed in a form resembling that of covariant theory, except
for few additional instantaneous interactions which can be treated
systematically. The LF formulation also provides a transparent discussion of
the Goldstone Boson (or Electroweak) Equivalence Theorem, as the illustrations
show.
