Putin Ukraine buildup similar to that used in taking of Crimea

The Sun:

THREAT OF WAR Fears of all-out conflict in Ukraine as sabre-rattling Vladimir Putin places 40,000 troops and armoured vehicles along the border

The manoeuvres are part of what the Russian strongman sees as the fortification of a new front line with NATO

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Officials told the publication similar movements were seen before Vladimir Putin carried out his deceptive annexation of the Crimea.

Such manoeuvres have reduced the “warning time” available to the US if he decides to launch another attack.

In June it was reported Russia was constructing an army base near the border which it considers to be a new front line with NATO.

A Reuters reporter who visited the Russian town of Klintsy, about 30 miles from Ukraine, saw a makeshift army camp, large numbers of newly-arrived servicemen and military vehicles.
...

There is zero threat of an invasion of Russia so there is zero need for fortifications of the border.  An invasion of Ukraine would make both Trump and Hillary Clinton look weak because neither one of them is willing to do anything to stop him.  The US and Europe could cut off Putin's ability to transfer funds which could further cripple the Russian economy.  That would probably be the most likely move if Russia does attack Ukraine.