he can't just roll out of bed one morning and say, "I'm bored, lets invade Venezuela!".
Of course not. It takes months and months of planned villanizing of the country, false accusations, and grandiose declarations about the future of freedom and democracy before you can go to war.
But y'know, Islamic Terrorism, Chavez is Friends with Ahmadenijad, FARC, Islam in South America is a Huge Problem, After All.
Or years and years and sometimes we never "get" to invade the countries we "want to invade" (see Iran, N.Korea, Pakistan, Venezuela, Cuba, Syria, Sudan, Congo).