Newark Mayor Cory Booker has made $1.3 million in fees for 90 speeches he has delivered around the country since 2008, including nearly $500,000 since the start of last year.

Booker disclosed his income from speaking engagements in a filing made yesterday with the US Senate.

The Democrat is required to report his income because he is running for the Senate in 2014.

His campaign staff provided further details, saying Booker has paid $476,000 in taxes for his speech income and has given away $620,000 to charity. Nearly half of the speeches have been at colleges.