By Bruce S. Ticker Bruce S. Ticker PHILADELPHIA — Perhaps “from the river to the sea” actually means “from the Chicago River to Lake Michigan.” Or is that “from the Mississippi to Lake Superior?” There appears to be as much political animosity in America over Israel and Gaza as there is live warfare 6,000 miles from Chicago and Minneapolis. Three midwestern mayors got mixed up with the war in recent days, giving them a respite from resolving concerns over education, gun violence, housing needs and other local trifles. The mayors of Chicago and Minneapolis voted on cease-fire resolutions and th…