The Nevada Senate race is now deemed to be a toss-up, making things more difficult for Democrats as they seek to hold on to their slim majority in the upper chamber next year.

The nonpartisan Cook Political Report shifted the race from being “lean Democrat” to a “toss-up” on Wednesday, pointing to President Joe Biden’s lagging popularity in the battleground state and the new electorate that has emerged over the last few years. The group particularly cited Sen. Jacky Rosen’s (D-NV) lack of an “established brand,” noting that it could make it more difficult for the Nevada Democrat to overcome Biden’s unpopularity on her own.