I think they are talking about at the state level. Southern Democrats and NE Republicans mess the map up a tad.
I did this list the other day. It shows the list of states where the GOP/Dems control both state houses or are tied and the state’s Presidential Election leanings. Some interesting data:
GOP CONTROLLED HOUSE + SENATE
ALABAMA (SAFE RED)
ARIZONA (SAFE RED)
FLORIDA (LEANS RED)
GEORGIA (SAFE RED)
IDAHO (SAFE RED)
INDIANA (SAFE RED)
KANSAS (SAFE RED)
MAINE (SAFE BLUE)
MICHIGAN (LIKELY BLUE)
MINNESOTA (LIKELY BLUE)
MISSOURI (LEANS RED)
MONTANA (SAFE RED)
NEBRASKA* (SAFE RED) - UNICAMERAL GOVT
NEW HAMPSHIRE (LEANS BLUE)
NORTH CAROLINA (SAFE RED)
NORTH DAKOTA (SAFE RED)
OHIO (TOSS-UP)
OKLAHOMA (SAFE RED)
PENNSYLVIANIA (LEANS BLUE)
SOUTH CAROLINA (SAFE RED)
SOUTH DAKOTA (SAFE RED)
TENNESSEE (SAFE RED)
TEXAS (SAFE RED)
UTAH (SAFE RED)
WISCONSIN (TOSS-UP)
WYOMING (SAFE RED)
SPLIT-HOUSE-SENATE
ALASKA (SAFE RED)
COLORADO (TOSS-UP)
IOWA (TOSS-UP)
KENTUCKY (SAFE RED)
LOUISIANA (SAFE RED) - SENATE IS TIED 19-19 PENDING 22 FEB ELECTION
MISSISSIPPI (SAFE RED)
NEW YORK (SAFE BLUE)
OREGON (SAFE BLUE) - HOUSE IS TIED 30-30
VIRGINIA (SAFE RED)
DEM CONTROLLED HOUSE + SENATE
ARKANSAS (SAFE RED)
CALIFORNIA (SAFE BLUE)
CONNECTICUT (SAFE BLUE)
DELAWARE (SAFE BLUE)
HAWAII (SAFE BLUE)
ILLINOIS (SAFE BLUE)
MARYLAND (SAFE BLUE)
MASSACHUSETTS (SAFE BLUE)
NEVADA (TOSS-UP)
NEW JERSEY (SAFE BLUE)
NEW MEXICO (TOSS-UP)
RHODE ISLAND (SAFE BLUE)
VERMONT (SAFE BLUE)
WASHINGTON (SAFE BLUE)
WEST VIRGINIA (SAFE RED)
Note that the Iowa Senate is 26-24 in favor of the Dems. We are two seats away from a total majority, and only two votes have to be peeled off to pass legislation (there is no tie-breaker vote in Iowa, the measure simply fails for lack of majority).