Putin undermining democracy in Ukraine?

Two senators took shots at Russian President Vladimir Putin on Sunday for his roll in the unrest in Ukraine, suggesting he is "undermining" democracy.

Sen. Dick Durbin (D-Ill.) warned that Putin "has been a threat for decades" to Ukraine, which shares a border with Russia.

"We have to stop Putin from undermining this natural evolution of democracy," Durbin said on "Fox News Sunday."

Since the violence erupted in Ukraine, 82 protesters have been killed and President Viktor Yanukovych has been ousted by Parliament.

Many protesters were upset by Yanukovych's decision not to join the European Union, which came after Russia pressured the neighboring country not to enter the 28-member European bloc.

"They need to determine their future, not Russia," Sen. Kelly Ayotte (R-N.H.) said on "Fox News Sunday."

But Ayotte also directed criticism toward the Obama administration and raised questions about the "reset button" President Obama offered to Russia last year in a gesture intended to improve diplomatic relations.

She called on President Obama to "up his game."

"Now that the Olympics are over, we need to watch the behavior of the Russians, and President Obama needs to up his game," Ayotte said.

Ayotte said the Obama administration should "reset the reset" button.

"Their reset policy has failed," Ayotte said. "It is time to reset the reset, and I think this presents a good opportunity with Ukraine."