With its Kursk offensive, Ukraine has not only crossed Russia’s borders. It has also crossed red lines set in Washington.
Ever since Russia’s full-scale invasion of Ukraine, the US has insisted that its goal is to help Ukraine defend its territory and survive as a sovereign state. Any suggestion that the war could be taken into Russia has been regarded as dangerous.
In the aftermath of the Kursk incursion, President Volodymyr Zelenskyy of Ukraine has been contemptuous of the restraints that America has placed on Ukraine’s war efforts, denouncing the “naive, illusory concept of so-called red lines regarding Russia, which dominated the assessment of the war by some partners”. That view, said the Ukrainian president, has now “crumbled”.