Republican vice-presidential candidate Paul Ryan spoke out against the Chicago Teachers Union strike on Monday, saying he stands behind Chicago Mayor Rahm Emanuel's opposition to the demonstration.

"Mayor Emanuel is right today in saying that this teacher's union strike is unnecessary and wrong," Ryan said in Portland, Ore., according to a pool report transcript. "We know that Rahm is not going to support our campaign, but on this issue and this day we stand with Mayor Rahm Emanuel."

More than 26,000 education professionals in the Chicago area did not attend work on Monday over a contract negotiation dispute with the Chicago Board of Education.