APTOPIX Russia Ukraine

The damage on one of three Ukrainian ships is seen docked after been seized ate Sunday, Nov. 25, 2018, in Kerch, Crimea, Monday, Nov. 26, 2018.  (AP Photo)

Sunday’s dramatic events in the Kerch Strait, where Russian troops seized three Ukrainian navy vessels, highlight the Kremlin’s resolve to hold on to the spoils of its aggression against Ukraine and flout its international obligations. They also show the lengths Ukrainian President Petro Poroshenko is willing to go to remain in power.

The clash had been brewing since April, a month before the opening of a new 12-mile bridge across the Kerch Strait between the Russian mainland and annexed Crimea. The $3.4 billion project was the Kremlin’s way of demonstrating the permanence of the annexation. It also opened a supply route that doesn’t go through Ukrainian territory.

The bridge was built without regard to Ukrainian shipping at two Azov Sea ports, Mariupol and Berdyansk; its central arch is just 33 meters tall, keeping out more than a hundred ships that have regularly docked at the ports. They account for about 9 percent of Ukraine’s grain exports.

Understandably, the bridge isn’t popular in Ukraine and Moscow is paranoid about Ukrainian sabotage. The Russian coast guard has been holding up mainly Ukrainian merchant ships and conducting exhaustive checks, which Ukraine and the European Union have interpreted as harassment, even a partial blockade.

The checks are, indeed, illegal. In 2003, Russia and Ukraine agreed to the free movement of each other’s ships through the Kerch Strait and the Sea of Azov. Russia argues that the inspections are justified on security grounds and rarely exceed three hours — though some have lasted days.

Sunday’s escalation came when Ukraine tried to move three navy vessels from Odessa on the Black Sea to Mariupol. The Russian authorities proved unwilling to let warships, even small ones, pass. Though Ukraine warned Russia that the ships were coming, the Russian coast guard rammed one of the vessels and seized all three, wounding six sailors, according to the Ukrainian navy. Russia also blocked the passage under the Kerch Strait bridge with a container ship and sent warplanes.

Ukraine’s reaction was forceful. It called a United Nations Security Council meeting for Monday, demanding more sanctions against Russia. Foreign Minister Pavlo Klimkin warned that Russia could be planning “further acts of aggression.” And Ukraine’s Security and National Defense Council recommended martial law for 60 days.

Russia, though, has been quick to point out that the escalation benefits Poroshenko domestically. Russian Deputy Foreign Minister Grigory Karasin called the Ukrainian warships’ voyage a “provocation.” “Apparently, against this background it’s easier for Poroshenko to unfold his election campaign,” Karasin said.

The presidential election is scheduled for March 31. It can’t be held while the country’s under martial law, but if it’s introduced for 60 days only, the vote can take place as planned.

Poroshenko cannot run on economic achievement. Five years after its Revolution of Dignity, Ukraine is Europe’s poorest country with an economy stuck below the pre-revolutionary level and no breakthrough in sight while oligarchs and corrupt officials keep preying on it. Recent scandals (a top official fled across the border this month after evidence surfaced of his bribe-taking) aren’t helping the president. So he’s highlighting his patriotism instead and his success in ripping Ukraine from Russia’s orbit. His campaign slogan is “Army, Language, Faith.” That’s a surprisingly hard-core nationalist agenda for a confectionery tycoon who was, until recently, involved heavily in business with Russia.

On the other hand, Russian President Vladimir Putin, who’s losing support at home because of unpopular moves such as raising the retirement age, isn’t averse to an escalation either to bring back some of the patriotic spirit kindled by Crimea. Putin and Poroshenko cannot disguise their mutual hatred when they’re in the same room — but they’re natural allies on weapon-rattling with no military or strategic purpose.

Neither is interested in all-out war, however. An “official” conflict involving Russia’s regular military would mean a sharp rise in the death toll and that’s a potent antidote to the rousing rhetoric.

Accidents are possible, though, given the likely months of brinkmanship. So too are harsher Western sanctions against Russia, which refuses to give an inch in a situation that’s as damaging to its prospects as it is to Ukraine’s.

Leonid Bershidsky is a columnist with Bloomberg View.