Senate Minority Leader Charles E. Schumer on Friday called on President Trump to cancel his summit with Russian President Vladimir Putin in the wake 12 Russian intelligence officers being charged with conspiring to hack Democrats during the 2016 presidential campaign. “Glad-handing with Vladimir Putin on the heels of these indictments would be an insult to our democracy,” Schumer (N.Y.) said in a statement less than an hour after Deputy Attorney General Rod J. Rosenstein detailed the new charges at a midday news conference. Trump is scheduled to meet with Putin on Monday in Helsinki. During a joint news conference Friday...