Public records filed with television stations across the country show Republican candidates, campaign committees and allied outside groups have spent more than their Democratic counterparts in all but one state.
But both sides are pouring unprecedented amounts of money into the critical races. Combined, Democrats and Republicans have spent more than $12 million so far in North Carolina, where Sen. Kay Hagan (D) faces a difficult re-election battle. Outside groups have bought advertising totaling more than $18 million stretching from now through Election Day in Alaska, where Sen. Mark Begich (D) is seeking a second term.
Here’s our look at which side has the spending advantage in each state since Jan. 1, 2014:
A note about methodology: We’re only including money spent on general election advertisements. That means the millions of dollars being spent in states with primaries — primarily Iowa and Georgia — aren’t counted. We’ll start counting those states after the primaries are decided. Similarly, most of the money spent in Kentucky so far has been in the Republican primary. Senate Minority Leader Mitch McConnell and Secretary of State Alison Lundergan Grimes (D) have only just started spending on general election ads, which is all we’re counting.
Check back each week for updated spending figures.