The poll is good news for Marshall, who will probably face a primary runoff election against Cunningham in a few weeks. Marshall not only got significantly more votes than Cunningham in the first round of voting, but can now use this poll to make a strong case for why she is the more electable Democrat.
Burr is the only incumbent Republican Senator who is likely to lose in the general election. (Most Republican Senators who saw themselves facing serious general election challenges this cycle chose not to seek re-election.) If the poll numbers continue to look good for Marshall, expect North Carolina to be a big focus of Democrats looking to make up for expected losses elsewhere.