Who has a better track record of bringing this country forward, Dem's or Rep's?
There's really no way to answer that honestly, since there are two unknowable variables in the equation.
First would be the definition of "bringing this country forward", as I guarantee you the two sides of the ideological spectrum would disagree wildly on that.
Second, it could be very reasonably argued that the actions and term of a current President and/or Congress aren't fully realized right away. It could be that a good or a bad economy, for example, could be traced to one or two or three administrations earlier.
It's a good question for a standard silly partisan slap fight, but impossible for an honest person to answer.
.