Six days out, Senate control is a toss-up as South Carolina joins the list of close races

Control of the Senate remains up for grabs with six days left before the Nov. 3 election, and the list of competitive races keeps growing.

Republicans hold the chamber 53-47. Because Vice President JD Vance breaks ties, Republicans keep control with 50 seats, which means Democrats need a net gain of four.

The ratings

The latest Fox News Power Rankings favor Democrats in 48 seats and Republicans in 47, with five toss-ups: Alaska, Iowa, Maine, Michigan and Texas, Fox News reported Wednesday. Ohio moved from toss-up to Lean Democrat, and South Carolina slid from Likely Republican to Lean Republican.

In Alaska, Iowa and Kansas, about 10% of voters in recent high-quality polls said they were undecided or would not back either major candidate, according to the Fox analysis.

Latest Senate polls

Source: poll roundup compiled by Forbes.

In South Carolina, a separate survey from The Citadel had Graham, the late senator's sister, ahead 43% to 39%, Forbes reported.

The national mood

Nationally, Democrats led Republicans 47% to 36% on a generic congressional ballot in a Reuters/Ipsos poll taken Oct. 22 to 26, Al Jazeera reported. The same poll put President Trump's approval at 32%.

More than 35 million Americans had already voted as of Tuesday, CBS News reported, citing the University of Florida Election Lab.