El-Sayed's victory sends tremors through Democratic Party

Image source, Getty ImagesByNorth America correspondentThe primary results across five states on Tuesday were a snapshot of the mood of the American electorate three months before midterm elections that will decide which party controls Congress and key state governments.In a year in which Republicans appear to be facing significant electoral headwinds, Democrats have taken a chance on a left-wing insurgent in a high-stakes Senate race in Michigan.And the results taken across the board provide further evidence that pro-Israel candidates are at risk in Democratic primaries. Meanwhile, Donald Trump's hold on the Republican Party, and the power of his primary endorsements, was once again on display.Here are four key takeaways from Tuesday night's results.Abdul El-Sayed's victory on Tuesday night in Michigan's contentious Democratic primary race for Senate was hardly a surprise. He had led by a comfortable margin over Congresswoman Haley Stevens for weeks.While the final result was much closer than those surveys had suggested, again raising questions about modern polling accuracy, it doesn't diminish the tectonic tremors the victory of the former Michigan health official is sending thro...