Progressive ​candidate Abdul El-Sayed held a narrow lead over US Representative Haley Stevens in Michigan's Democratic US Senate primary on Tuesday, though the outcome of a race viewed as a major test of the Democratic Party's future remained uncertain. Read moreMichigan Democrats pick nominee in high-profile Senate primary amid record pro-Israel spendingWith 70 percent of the estimated vote counted, CNN showed El-Sayed leading Stevens by 49.8 percent to 46.3 percent. The contest has emerged as one ​of the clearest ‌tests yet of the direction of the Democratic Party, pitting El-Sayed's campaign against Stevens, an establishment-backed moderate supported by Democratic leaders and pro-Israel ⁠groups. The poll also found deep Democratic scepticism of US support for Israel, a central issue in the Michigan race. Democratic US Representative Marie Gluesenkamp Perez of Washington and state Senate Republican Leader John Braun advanced to the general election in the state's top-two primary.