 Funding for Here and Now comes from MathWorks, creators of MATLAB and Simulink software, accelerating the pace of engineering and science. Learn more at MathWorks.com. From NPR and WBUR Boston, I'm Don Gagne. I'm Vipa Fernandez. It's Here and Now. Coming up, President Biden is out of the presidential race and more Democrats are now endorsing Vice President Kamala Harris to be their party's nominee.