About 14 hours ago, volume started pouring in, increasing the odds from about 35% to almost 60% in the overnight hours.

Tuesday morning, the odds have traded from 40% to 60% range - consolidating after a massive ramp.

As of Tuesday morning, nearly 150 House Democrats are supporting impeachment action after "President Trump repeatedly pressured the president of Ukraine to investigate Joe Biden and his son Hunter at a time when Ukraine was desperate for military aid from the United States," said Michael Snyder via The End of The American Dream blog. 

The political storm surrounding President Trump's admitted call for Ukraine's President to investigate Joe Biden may have been what sparked impeachment odds to spike.