From The Washington Post:
"Through mid-February, Bloomberg has spent about $339 million on television and radio, more than the total that President Barack Obama spent on such ads during his 2012 reelection campaign, according to [AdImpact], a tracking firm. By comparison, the two top finishers in the 2020 Iowa caucuses, Buttigieg and Sanders, spent more than $10 million each on broadcast advertising in the state."
Read the full article here.