Historically enemies, minorities and parties like France's National Front are increasingly in sync as the former seek insurance against radical Islam and the latter tries to gain mainstream credibility.
A critical edition of Hitler's signature tome was published last year just as anti-refugee sentiment was rising in Germany. But concern that neo-Nazis were driving the book's best-seller status were unfounded.
In almost every country in the world, average ages are rising fast, putting pressure on city councils, health-care systems, and national economies. And the solution may be the empowerment of older people themselves.
Polish society has been riven between supporters of the populist conservative government and more liberal, pro-Europe urbanites. But the political split is spurring once reticent Poles to take to the street with new vigor.
The media were lambasted for failing to cite refugees' connections to mass sexual assaults around Cologne last New Year's Eve. Now they are treading carefully as they cover a young woman's murder, allegedly by an Afghan refugee.
The Italian prime minister has staked his reputation on Sunday's referendum to reform Italy's inflexible political system. But younger voters are lining up strongly against his vision, despite their desire for change.
The far-right Freedom Party's Norbert Hofer is in a presidential runoff Sunday, and many feel the US result has buoyed his campaign. But Trump's unexpected ascent has also stirred the campaign of his Green rival.
François Fillon's unexpected win in the Republicain primaries has raised eyebrows. But his conservative policies, including cutting 500,000 public-sector jobs, could firm the EU's fraying Franco-German core.