Responding to Donald Trump's decision to declare a national emergency to fund his border wall with Mexico, House speaker Nancy Pelosi says he is setting a precedent that should be met with 'great unease and dismay' and the Democrats are considering making a legal challenge. 'You want to talk about a national emergency? Let’s talk about today,' Pelosi adds, noting that it is the first anniversary of the massacre at Florida's Marjory Stoneman Douglas high school, in which 17 people died



