Liberals, including the vast number of Democrats, but with support from some Republicans, but not many, over the years, have given America many important programs and laws, with no help from Conservatives over the past century.
These include:
The 19th Amendment—Women Suffrage
Social Security Act
Medicare and Medicaid
Environmental Legislation
Consumer Protection Laws
Labor Laws
Civil Rights Laws
War On Poverty
Americans With Disabilities Act
Affordable Care Act
Most of these laws were passed by strong majorities of Democrats in Congress, with the most success under Franklin D. Roosevelt and the New Deal, and Lyndon B. Johnson and the Great Society.
Other legislation was passed by Democratic majorities in Congress and cooperation with Republican Presidents.
But most Southern Democrats and the majority of Republicans who call themselves “Conservatives” battled to prevent such reforms.
So to declare oneself “Liberal” is a “Badge of Honor”.