It needs to not be close. Biden was polling way ahead in 2020 but he only won effectively by like 85k votes. Yes, he got 7 million more votes total but in the closest states that could have seen him lose, only about 85k people was the difference between Biden winning the presidency vs Trump winning.
2020 was decided by even less than that! Closer to 43,000 votes across Arizona, Georgia, and Wisconsin.
It needs to become a nation-wide single-issue to revamp our campaign finance and election system.
That means abolishing the Electoral College and FPTP, addressing Gerrymandering, implementing ranked choice voting, and publicly-funded elections. This is the only way we fix our democracy at the root of the problem.