U.S. Senator Tom Cotton’s campaign says he raised more than $1 million over the past three months for his re-election bid.

The Arkansas Republican on Tuesday announced he ended the second quarter with $3.5 million in the bank for the 2020 race.

Cotton was first elected in 2014, defeating incumbent Democratic Senator Mark Pryor. He’s being challenged by Democratic hopeful Josh Mahony of Fayetteville.

Cotton’s campaign did not say how much money was spent during the quarter, but says it has more than three and a half times the amount of cash on hand compared to this point in the 2014 race against Pryor.