On the basis of primary votes cast by party, Democrats in Kentucky should be worried for November. For those offices where both parties have contested races, there are more votes cast for Republican candidates than for Democratic candidates.
I don't recall this having ever happened statewide in Kentucky before - ever.
Governor, D - 178,514
Governor, R - 214,187
State Treasurer, D - 163,804
State Treasurer, R - 180,267
By far the main driver of turnout is the governor's race. For apparently the first time ever, the Democrats did not have a competitive governor primary while the Republicans did.
I'd suggest if anybody should worry, it's the Republicans. The 2014 primary for U.S Senate had a turnout of nearly 350,000 votes and Bevin received 125,000 in that vs. the approximately 70,000 he got in this.