If you build it, they will come. And if you play it, they will come.
That is their job, after all, the work of reporters and photographers, bringing Americans the news and video they want to see. Members of Congress know that, and that their reputation, which has been in decline, is at stake.
That's a cynical view, of course. But use the search engine for Google, click on the Townhall entry, and this will appear at the top of the page:
Click on the article from Politico about the congressional baseball game and there will be this full-screen photo:
And do it for CNN and you will be immediately confronted, before the mandatory video (concluding with applause) begins, of a picture of the huddled masses yearning to be seen praying.
On the positive side, there seems to be few if any chants of "USA! USA!" and not all media outlets- such as The New York Times (where it is not as prominent)- featured this display of piety. Journalism is not dead. Still, it appears that at least one person was unimpressed:
And when you pray, you must not be like the hypocrites. For they love to stand and pray in the synagogues and at the street corners, that they may be seen by others. Truly, I say to you, they have recieved their reward. But when you pray, go into your room and shut the door and pray to your Father who is in secret. And your Father who sees in secret will reward you.
-Matthew 6:5-6, ESV