WSJ:

TV viewers in Super Tuesday states know this: Michael Bloomberg and his presidential campaign are on almost every channel. All day. And nearly all night.

The former New York City mayor appears on presidential primary ballots for the first time this week as 14 states, a U.S. territory and Democrats scattered around the world weigh in on the party’s nomination contest. It will be a test of whether Mr. Bloomberg can leap ahead of his primary rivals by vacuuming up a substantial number of delegates—and whether pouring more than a half-billion dollars into political advertising, including more than $160 million into TV in Super Tuesday states, will pay off.

That unprecedented amount of spending has bought him an overwhelming presence in American households in just a few short months, a Wall Street Journal analysis of data from political ad tracker Kantar/CMAG shows. Through last Tuesday, Mr. Bloomberg was behind almost 62% of all the political ads from Democratic presidential candidates aired on television in the 14 Super Tuesday states, the data show.