Republican presidential candidate John McCain said Wednesday the Senate should apologize for slavery and segregation, calling them “dark chapters in our history.” McCain said he would support a planned resolution by fellow Republican Sen. Sam Brownback, who is also seeking the presidency, to apologize for racist laws, some of which ended more than a century ago. “They were federal policies,” Brownback told the Boston Globe on Monday. “They were wrong. The only way for us to move forward . . . is at the end of the day acknowledging those, taking ownership for it, and asking for forgiveness.” McCain agreed...