In 1945 Truman told Eisenhower during the Potsdam Conference that if desired, the president would help the general win the 1948 election, and in 1947 he offered to run as Eisenhower's running mate on the Democratic ticket if MacArthur won the Republican nomination.
The problem is that there are a lot of things which can ferment to make vinegar, including things which can't be eaten like wheat and rye. The OU guide lists several brands of balsamic vinegar which they certify as kosher for passover (see the second link in the sources below).If you want a much longer explanation of how vinergar is made and the Jewish implications, see the article in the third source.ll extra virgin olive oils are Kosher for Passover, even without any Kosher supervision. All other oils (including olive oil) require a reliable Kosher certification to be consumed on Passover..
At the Passover seder, it is customary to eat matzah made of flour and water; matzah containing eggs, wine, or fruit juice in addition to water is not considered acceptable for use at the seder. The flour can be made from the five grains mentioned in the Torah: wheat, barley, spelt, rye and oats.â¯Exodus 12:8 From the evening of the fourteenth day of the first month until the evening of the twenty-first day, you are to eat matzah. ââ¯Exodus 12:18 You are not to eat any chametz with it; for seven days you are to eat with it matzah, the bread of affliction; for you came out of the land of Egypt in haste.