Countdown SC

10

Days until S.C. GOP primary

17

Days until S.C. Democratic primary

Thursday

Democratic presidential debate on PBS in Wisconsin, 9 p.m.

Saturday

Republican presidential debate on CBS in Greenville, 9 p.m.

Feb. 20

S.C. GOP primary; Nevada Democratic caucuses

Feb. 23

Nevada GOP caucuses

Feb. 27

S.C. Democratic primary

$10.3 million

Who has been the biggest spender in South Carolina?

According to data from SMG Delta, it is Republican Jeb Bush's Super PAC, Right to Rise, which has spent $10.3 million on ads.

Other top S.C. spenders:

▪ Republican Marco Rubio’s campaign and outside groups — $9.4 million.

▪ Republican Ted Cruz’s campaign and outside groups — $5.7 million

▪ Republican Donald Trump's campaign — $1 million

▪ Democrat Bernie Sanders' campaign — Almost $750,000

▪ Republican Ben Carson's campaign — Almost $700,000.

▪ Democrat Hillary Clinton’s campaign — $440,000

This story was originally published February 9, 2016 at 11:27 PM with the headline "Countdown SC."