It has now becomes dangerous: Trump is clearly ahead. Hilary Clinton must score substantially if the country is not to fall into political raving.

Hillary Clinton vs. Donald Trump: With great probability, that will be the duel for which the U.S. can brace itself. After their victories on Super Tuesday — when the competition was well-beaten — the nomination can hardly be taken from either of them. One is as anticipated as the other was for a long time inconceivable.

Trump’s success shows that he is capable of appealing to voters across all echelons and in all parts of the country. Clinton and the Democrats must not repeat the mistake of the Republicans and underestimate Trump. For too long, too many laughingly shrugged off the New Yorker and his mad theories. Clinton knows from the experience of the primaries against Bernie Sanders how easy it is for an underestimated candidate to become a threat.

Trump’s advantage, which he will also play out against Clinton, is his anti-establishment stance. Businessman, instead of party insider, who tells it like it is and doesn’t hide behind hollow phrases — that’s how Trump stages himself, and his fans run after him without thinking. At the same time, no one is as easy to tear to pieces as Trump.

His platform is full of holes; his positions vacillate. Only hardly anyone stops long enough for a fact check in a primary battle that is becoming shriller and shriller. Those disappointed by Washington and frustrated by life prefer to cheer Trump’s plans for a wall, and applaud when the candidates sling mud at one another.

Clinton must not play along with this game. She is powerless against Trump’s political value as a newcomer. No one belongs more to the political establishment of Washington than the Clintons. She has felt the backlash of that since her candidacy. The former secretary of state can no longer score with surprise. She has to sell content.

Her election platform is detailed. Against Sanders — who forces her to it with explicitly left-wing topics — Clinton shows knowledge in every last detail. If she forces Trump into an argument about content in a possible one-on-one situation, she can most easily reveal his weaknesses. In any case, the negative campaigns will continue on both sides, but they have often enough ricocheted off of Teflon-Trump.

The U.S. stands before a decisive election about not only which party will govern the White House at the end, but also whether the country wants to give in to the political raving of a Donald Trump.