[8] During his term in the legislature, Maurer fought for the passage of a plan for Old Age Pensions and attempted to prevent the establishment of a State Constabulary, which was seen as a mechanism for the armed and organized breaking of strikes.

In January 1916, Maurer was part of a three-person delegation to President Woodrow Wilson to advocate part of the Socialist Party's peace program, proposing that "the President of the United States convoke a congress of neutral nations, which shall offer mediation to the belligerents and remain in permanent session until the termination of the war".

When he attempted to explain his voting rationale on the floor, Maurer was rudely shouted down by his colleagues and ruled out of order by the chair.

[9] Hillquit later recalled that Wilson was at first "inclined to give us a short and perfunctory hearing" but as the Socialists made their case to him, the session "developed into a serious and confidential conversation".

Wilson told the group that he had already considered a similar plan but chose not to put it into effect because he was not sure of its reception by other neutral nations.

"[10] On July 30, 1917, a public Maurer speaking event in Seattle was the scene of a near riot when his speech on the topic "Is Conscription Constitutional?"

At an "open air mass meeting" held under the auspices of the People's Council of America, Maurer had spoken for about 15 minutes when a group of soldiers began heckling him.

Maurer briefly tried to shame the hecklers into silence, but instead the soldiers rushed the speaker's platform and forcibly brought his oration to a close.

According to a contemporary news report, only the quick action of a local socialist activist, Kate Sadler, prevented the tense situation from degenerating into a riot, when she leaped to her feet, scolded the young soldiers, and abruptly launched into a short fundraising speech that defused the situation and allowed for an orderly termination of the meeting.

[12] In his capacity as head of the Pennsylvania Federation of Labor, Maurer was very active in the steel strike of 1919 in Pittsburgh, helping to organize workers to win the right of collective bargaining with their employers.

I believe President Roosevelt is sincere and that he really hopes to lift the suffering masses out of their desperate poverty and yet save capitalism ...Just how President Roosevelt and his advisers hope to lift the exploited and oppressed out of the mire by increasing profits and raising the cost of living is too deep for me.