Many presidential campaigns do not make it to "Super Tuesday", fewer make it past the diverse state contests held that day. It is the nearest approximation of a nationwide election before the nominating conventions.
The candidates who win the largest share of delegates on Super Tuesday are well on the way to being their party's nominee.
It is safe to say Democrats will be happier at the outcome than the Republican Party. Hillary Clinton has decisively beaten Senator Bernie Sanders, giving the Democrats a likely candidate with solid experience and conspicuous competence. They might also be glad that the Republicans look likely to be saddled with Mr Trump rather than the more youthful and electable Marco Rubio.
Mr Rubio may be the opponent Democrats most fear but he is struggling for even second place in the Republican race. Texas Senator Ted Cruz's victories in his home state and neighbouring Oklahoma yesterday keep him in contention should the Trump bubble burst.
Mr Cruz is hardly more palatable than Mr Trump to anybody who is looking for good sense and sound judgment in the next president of the United States. Mr Trump at least does not take seem to take himself too seriously. Mr Cruz clearly takes his religious fundamentalism very seriously indeed.
Both appeal to an uncompromising mood on the conservative side of the American electorate. Mr Cruz would give them what they see; Mr Trump would be an unknown quantity.
Mr Trump has not been a classic conservative, having held some liberal positions previously. He says what any audience wants to hear, and says it with such entertaining gusto that he gets away with it, so far. He could be a bull in the China shop of power or just a blowhard.
It would be better not to find out.
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