Because the USA does not have a labor based political party, like Brazil, things continue to deteriorate rapidly in what used to be a prosperous and proud country.
Americans are very dissatisfied with the current POTUS in the White House, and Congress has an even worse record with the populace.
66% of Americans keep on saying that the country is going in the wrong direction, the path where millionaires, billionaires and big corporations profit, at the expense of average citizens.
One year is get rid of Republicans and put the Democrats in charge. In four years the attitude is get rid of the Democrats and put the Republicans in charge. And no matter what party is in power, the country keeps poing downhill. The two major parties have destroyed the USA.