Cumulative Total with Breakdown

Anonymous -

Maybe:

Cumulative Bill Count =
VAR __Category = MAX(Fact_Legislation_Unpivot[Category]
CALCULATE(
DISTINCTCOUNT(Fact_Legislation_Unpivot[BillID]),
FILTER(
ALLSELECTED(Fact_Legislation_Unpivot),
Fact_Legislation_Unpivot[Legislation Date] <= MAX(Dim_Date[Date]),
Fact_Legislation_Unpivot[Category]=__Category))

If not, sample data would greatly assist. 

Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.