On December 13, Rocky De La Fuente filed a lawsuit in Minnesota State Supreme Court over ballot access into the Republican presidential primary. Currently the ballot will only list President Trump. The new presidential primary law gives the state party the sole discretion to choose names, and the lawsuit says this violates the State Constitution. See this story.
De La Fuente also has a federal lawsuit in Minnesota on this point, but it is not moving very fast. The state’s answer is due December 27.