* Congresswoman offers glimpse of running mate role * Opinion: Black Americans are in an abusive relationship * US politics live – rolling reportVal Demings, a Democratic representative from Florida among contenders to be Joe Biden’s presidential running mate, has castigated Donald Trump for having the “gall and nerve” to use a gaffe by Biden as a weapon on the campaign trail.Biden apologised on Friday, for saying that if African Americans “have a problem figuring out whether you’re for me or Trump, then you ain’t black”.The remark prompted gleeful tweets from Trump, fierce attacks from supporters of the president and criticism from Biden’s own backers.“The vice-president shouldn’t have said it,” Demings told CNN’s State of the Union on Sunday.“But I really think the gall and the nerve of President Trump to try to use this in his campaign, he who has since day one done everything in his power, supported by his enablers, to divide this country, particularly along racial lines …“Look, let’s talk about race because we definitely need to, we see it in housing, we see it in voting rights, we see it in healthcare, we see it in education.
