The Economist asks
Before 1 October 2019, will Robert Mueller testify in person before Congress?
Since announcing his resignation as Special Council on 29 May, members of Congress continue to call for Mueller to testify before Congress about matters surrounding his "Report on the Investigation into Russian Interference in the 2016 Presidential Election" (The Economist, The Hill, The Washington Times, Fox News, The Washington Times). Testifying in person before any House, Senate, or joint committee (publicly or otherwise) would count toward resolution.
The question closed "Yes" with a closing date of 24 July 2019 (BBC).