Listen (to) how/what ...

Here are excerpts from New York Post:

The White Plains CPA’s whining began as soon as he trudged into the lower Manhattan courthouse on July 30, grousing to anyone who would listen how little time he had for public service, a court source said. (New York Post)

Murphy previously stated he would listen to what Rodgers has to say, but that No. 12 would not be “part of the process.” (New York Post)

Can you add 'to' in the first quote and/or omit 'to' in the second?

...listen to how little time he had for public service...

...listen what Rodgers has to say...