Likely voters who don’t identify with either party represented 29 percent of the electorate in the last presidential election and now back Clinton over Donald Trump 39 percent to 35 percent in a head-to-head contest, the latest Purple Slice online poll for Bloomberg Politics shows. When third-party candidates are included, she holds a three-point edge.

The findings, just days ahead of the election, suggest Trump is still struggling to rebuild even the losing coalition Romney assembled, despite modest gains he’s made in recent polls. The Republican needs to expand his support beyond his core white, working-class voters, yet that doesn’t appear to be materializing even in the wake of a bad campaign week for Clinton.

“This is a very tight race among independents, who are finding themselves alienated from both major party candidates as well as both parties as they make their final choice,” said pollster Doug Usher, who led the survey.