  The quark-antiquark potential and the chromoelectric fields generated by
``quarks'' in the adjoint representation of SU(2) color are analyzed in the
scaling region of the theory. New results with interesting implications for our
understanding of the confinement mechanism are presented. In particular, the
formation of color-electric flux-tubes between adjoint quarks is demonstrated
in four-dimensional SU(2) color. The flux-tubes for fundamental and adjoint
representation quarks are shown to have very similar cross-sections. This
result could imply that the QCD vacuum is dual to a type I superconductor.
