President Trump fired off a nasty tweet at his former aide Omarosa Manigault Newman Tuesday, calling her a “lowlife” and a “dog.”President Trump fired off an incendiary tweet at his former aide Omarosa Manigault Newman Tuesday, calling her a “lowlife” and a “dog.””When you give a crazed, crying lowlife a break, and give her a job at the White House, I guess it just didn’t work out. Good work by General Kelly for quickly firing that dog!” Trump tweeted.