I summarize recent work on magnetic CVs (mCVs). Observations were carried out using the McDonald Observatory 2,1-m telescope obtaining high-speed (1-5 sec cadence) photometry, analyzed in coordination with photometry from the Transiting Exoplanet Survey Satellite (TESS), with 120-s cadence. Asynchronous Polars (APs) and the possibly related new class of slowly rotating Intermediate Polars (IPs) are the focus of this work. An Interactive Magnetic Value Model was developed and proposed to explain mass transfer variations in APs. In this model,
the strong magnetic field of the white dwarf interacts with the moderately strong magnetic field of the rapidly spinning donor star. The superposition of the magnetic fields of both stars at the inner Lagrangian point (L1) may either inhibit or enhance mass transfer through L1, depending on the orientation of the resultant field. Rapid changes in the accretion rate are observed in polars, initiating high or low accretion states, and in some IPs, and may be explained by rapid changes in the composite magnetic field at L1 affecting the mass transfer rate.