There are several recent interviews with Fiona Hill, all right before the invasion started. But she hit the nail on the head - Trump has a lot of blame in Putin's deciding to make this move now. Trump made it clear to Putin that he considered Ukraine

Explaining Putin’s Decades-Long Obsession With Ukraine
We spoke with Fiona Hill, a former Trump adviser, about how the Russian leader’s view of history has led him to the brink of war.

Winston Churchill once described Russia as “a riddle, wrapped in a mystery, inside an enigma.” It’s a phrase that could equally apply to Vladimir Putin, the Kremlin’s leader, as the world awaits his next move on Ukraine.

To better understand him, we reached out to Fiona Hill, one of Washington’s foremost experts on the Russian president. Hill has served in multiple U.S. administrations as an intelligence officer and policy adviser, most recently as senior director for Europe and Russia on the National Security Council under Donald Trump.

She spoke with us about Putin’s longtime obsession with annexing Ukraine, her worries about how he’s closed himself off from outside information and his private boasts about his ability to “buy anyone” in the United States and Europe.

Fiona Hill says that Trump emboldened Putin to invade Ukraine by treating the country like a 'playground'

She said Trump's foreign policy had not been driven by concern about the US national interest, but by personal interests and impulses.

"There's no Team America for Trump," Hill said. "Not once did I see him do anything to put America first. Not once. Not for a single second."

Hill recalled Trump's praise for Russia's authoritarian leader, Vladimir Putin, as well as his disdain for NATO. She also mentioned his campaign to pressure Ukraine for manufactured dirt about Biden in the run-up to the 2020 election. The Ukraine pressure campaign saw Trump threaten to withhold military aid from the nation, which led to his first impeachment.

"All this did was say to Russia that Ukraine was a playground," Hill said, drawing a direct line to events today, as Russia has amassed a huge military force around Ukraine, prompting fears in the US and European countries that a military strike is imminent.