What is catching on and what is fading?

UP: Syrian victims of chemical weapons.

DOWN: Leading from behind.

President Obama in Germany President Obama at the Brandenburg Gate in Germany earlier this year. (Pablo Martinez Monsivais/Associated Press)

UP: Realization America must act in Syria.

DOWN: Likelihood of U.N. action on Syria.

UP: Alternative military scenarios for Syria.

DOWN: Gen. Martin Dempsey’s declaration that it is not in our interest to see Syrian President Bashar al-Assad go.

UP: A world with widely used chemical weapons.

DOWN: A world without nukes.

UP: Delay Obamacare.

DOWN: Defund Obamacare.

UP: The A.P. college football rankings.

DOWN: The federal government rating universities.

UP: Chaos in Egypt.

DOWN: Importance of “peace process.”

UP: Number of Republican House members who support comprehensive immigration reform.

DOWN: Signs of grass-roots fervor against immigration reform.

UP: GOP’s chances of picking up Senate seats in Arkansas, West Virginia, Montana and South Dakota.

DOWN: GOP’s chances of picking up Senate seats in Iowa and Michigan.

UP: Terry McAuliffe.

DOWN: Ken Cuccinelli.

UP: Mainstream media’s belief that Hillary Clinton is the inevitable nominee.

DOWN: Hillary Clinton’s legacy at the State Department.