Harry Enten from CNN has predicted that Democrats will have at least a 23 seat majority in the House holding 229 seats while Republicans hold 205 seats. The margin of error could put Democrats at a low of 205 or a high of 262. So, it could go either way, but at this point in time, polls show Democrats gaining 23 seats. However, in the Senate the Republicans are expected to gain 3 seats which would put them on top with 52 moajority.
Click here for charts including a forecast map, history, and likely outcome for both the House and Senate.