With one bound, US President Donald Trump was free. With the expected display of naked partisanship, Senate Republicans (with the exception of Mitt Romney) abandoned their constitutionally mandated role as judges of his alleged abuse of power. They have deferred the decision to the voters in November’s presidential election. Mr Trump will possess many advantages: passionate supporters; a united party; the electoral college; and a healthy economy. His re-election seems likely.

The most obvious reason why Mr Trump might win again is the economy. Even by his standards, last week’s State of the Union address was a case of exaggeration piled on hyperbole. As Joseph Stiglitz, the Nobel laureate economist, has pointed out, US performance remains poor by the standards of its peers in salient respects, notably life expectancy, employment ratios and inequality. Moreover, output, employment, unemployment and real wages are largely continuing post-crisis trends. Given the scale of the fiscal stimulus, which has delivered huge and enduring structural fiscal deficits, this is no great achievement. Nevertheless, many Americans will feel that the economy is improving. This will surely play a big part in the coming election.

If Mr Trump wins, this victory could well be even more significant than his first. For the American people to choose a classic demagogue twice could not be dismissed as an accident. It would be a decisive moment.