At the moment there's a slight edge for Democrats improving their situation in the election to be held in about 50 days. The attached link shows some interesting details on the states with close races and where things may be trending. It appears our situation improved since late July.
Presidential election is important but down ballet elections are vital as well.
I'm feeling pretty confident about the Democrats retaking the Senate. Donald Trump is going to be a huge weight around the necks of vulnerable Senate Republicans running in traditionally blue states. I doubt it will be a blowout like 2008 or 2010, but I have a feeling the Democrats will have a decent majority come January.
The House is a different beast though. I don't think Democrats will be able to take back the House until the next census.