He could force Boris Johnson to sign up to a Brexit deal with the EU http://www.theneweuropean.co.uk/brexit-news/westminster-news/nigel-farage-on-brexit-ultimatum-6215140
The House of Lords has approved a law which would force prime minister Boris Johnson to seek a delay to Brexit if he fails to deliver a deal before October 31st. https://buff.ly/2zVXymL
Q&A: Can Boris Johnson really force through a no-deal Brexit? https://www.theguardian.com/uk-news/2019/jul/28/boris-johnson-brexit-qa-can-he-force-through-no-deal?utm_term=Autofeed&CMP=twt_gu&utm_medium=&utm_source=Twitter#Echobox=1564299338