A Look At Immigration On Television News
The timeline below counts total mentions of immigration across television news of the past decade, showing a sharp rise since Biden's inauguration, but that Fox News far outpaces CNN and MSNBC. Over the past decade, Fox News has long covered it more than its two peers.
As to whether immigration is a "crisis," the timeline below shows that Fox News stands alone in characterizing current events as being a "crisis" though CNN and MSNBC have begun trending upwards as well.
Child migrants became a focal point in July 2014, June 2018, late 2018 through mid-2019 and since Biden's inauguration, as seen in the timeline below. In this case MSNBC and CNN are also covering child migrants, though less than Fox.