Explain the following sentence, "these presidents were lax in enforcing antitrust regulations"

The presidents Grover Cleveland, William McKinley, Theodore Roosevelt, and William Howard Taft are said to have beard laxity in the enforcement of the "Sherman Antitrust Act of 1890" which was passed under the president of Benjamin Harrison.

Explanation:

It is believed that the succeeding presidents who held the office of the president after the tenure of the 23rd president of the USA, Mr. Benjamin Harrison, did not enforce the "Sherman Antitrust Act of 1890" with the austerity that it was required to be enforced with.

So comes the statement 'these presidents were lax in enforcing antitrust regulations'.