On September 16, the California Republican Party and its chair filed this very brief response to the amicus curiae of Law Professor Erwin Chemerinsky, in Patterson v Padilla. That is the case on whether the state constitution bars the legislature from requiring presidential primary candidates to reveal their income tax returns.

The Republican response says that the arguments in the amicus are no different than the state government’s arguments. It further says that the amicus was filed after the deadline.

On September 16, the Working Families Party announced that it endorses Elizabeth Warren for the Democratic nomination. See this story. Thanks to Thomas Jones for the link.

Greenburg, Quinlan and Rosner, a polling firm that works for Democrats, has released a poll for the 2020 presidential race. Respondents were asked to choose among one of three Democrats, President Trump, and a hypothetical Libertarian nomination of Justin Amash.

Scroll down to question 57 for the Biden hypothethical: Biden 49%, Trump 40%, Amash 4%, someone else 2%, undecided or no answer 5%.

Question 59 has: Warren 48%, Trump 41%, Amash 5%, other 2%, undecided or no answer 4%.

Question 61: Sanders 48%, Trump 43%, Amash 5%, other 2%, undecided or no answer 2%.

Question 53, about the Republican presidential primaries, which was asked only of Republicans, found that Trump has 85% of the Republican primary vote.

Question 56, asked of Democrats, has the Democratic presidential primaries, and shows Biden leading the Democratic race. Thanks to Clifford Thies for the link.