Today's must-reads: June 16

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NPR takes a look at Vermont Sen. Bernie Sanders' campaign fundraising tactics, and asks how they might be useful to future candidates. They also fact-check Donald Trump's crticism of President Barack Obama's proposed goal of admitting 10,000 Syrian refugees to the U.S., and they investigate error-riddled voter rolls.

PBS NewsHour Measuring the ‘Trump effect’ on the 2016 presidential race Presumptive nominees Donald Trump and Hillary Clinton gearing up for the general election.