The Republicans vowed to obstruct Obama from day one and he got into office claiming the mantle of bringing everyone together in bipartisanship. Hillary probably doesn't have any delusions about trying to get Republicans to be reasonable and will rely a lot on continuing with executive orders. It will also depend on what the results of the House and Senate look like. If they lose the Senate and the margin in the House gets tighter there is no political upside to impeachment like in 98 and they would probably continue hearings like Gowdy and Chaffetz have already said.