RE: Among Orthodox Jews, Israel is THE issue. AJC is NOT representative of Orthodox Jews. They are strictly left-wingers.
Current estimates are that there are upward of 6 millions Jews in the USA.
The way I see it, in terms of affiliation, there are Orthodox Jews, Reform Jews, Conservative Jews, Reconstructionists and Secular Jews.
Of the above groups, which ones take the issue of Israel seriously and how many percent of the Jewish population in America do they occupy?
Orthodox Jews are maybe 10%, with maybe another 10% with an affinity for orthodoxy.
There are some Jews from each place across the spectrum who put a high priority on Israel.
Traditional (and other) Jews cherish the Land of Israel and may be more cynical about the secular government there than most imagine.
They evidence is in. The question has been answered over and over. Only a minority of American Jews believe American political arrangements make much difference to the State of Israel.
According to a 2013 NY Slimes article, of the 2.2% of Americans who are Jews,
"...Reform Judaism remains the largest American Jewish movement, at 35 percent. Conservative Jews are 18 percent, Orthodox 10 percent, and groups such as Reconstructionist and Jewish Renewal make up 6 percent combined. Thirty percent of Jews do not identify with any denomination..."