Clerk Karen Yarbrough detailed Gov. J.B. Pritzker’s overwhelming win in suburban Cook County — fueled by a huge turnout and more millennial and early voters than in 2014. The Chicago Teachers Union will kick off their effort Monday to negotiate a new contract for their 25,000 members by hand-delivering their demands to Mayor Rahm Emanuel. The holiday break will end in earnest, as the first committee meeting of 2019 calls aldermen back to City Hall.