NY Times has polling data for 88 races. Many are close but here are some...

[George II]

...where Democrats are ahead!!

Representative:

Rouda over Rohrabacher 47-44
Allred over Sessions 45-42
Delgado over Faso 43-42
Levin over Harkey 53-39
DAVIDS over Yoder 48-39 and another 51-43 (!!!)

Governor:

Gillum over DeSantis 48-43

Senate:

Nelson over Scott 48-44

Some not so good:

King over Scholten 47-42
Steil over Bryce 50-44
Blackburn over Bredesen 54-40

Actual race (District # and State) here: https://www.nytimes.com/interactive/2018/upshot/elections-polls.html

[Qutzupalotl]

1. Note that some of these are a couple of weeks old.

(Not the live ones, obviously.)

There has been a distinct blue shift in the last week or so.

[Funtatlaguy]

2. Yes these are old. Both TN & Fla Senate now Tossup.