Twitter community adds a context note to Joe Biden tweet:  The official Twitter account for the president tweeted, “I campaigned to restore the backbone of this country: the middle class and unions. Over the last two years that’s what we’ve been doing. Americans are working. The economy is growing. Incomes are rising faster than inflation." Twitter added a label to the post that read "Readers added context they thought people might want to know.” The added context read "Biden signed a law breaking a significant strike, which does not conform with his claim that he is restoring unions." The note included a link to support the assertion. The label is part of Twitter’s Community Notes system. Twitter users are able to sign up as contributors to add context to tweets.