The energy and momentum building behind Vice President Kamala Harris’s campaign may not be enough to bring competitive down-ballot races to the Democrats’ side, as polling shows that the House is still narrowly projected to stay under Republican control.

Sabato’s Crystal Ball ratings released Wednesday showed Republicans remain “narrowly ahead” but that there is not yet a clear winner. The polling group also noted two races that are shifting further into GOP favor as Republican lawmakers are seeking to expand their razor-thin House majority.