Sen. Ted Cruz, R-Texas, on Wednesday called for a "serious criminal investigation" into the dozens of White House visits that Robert Creamer made to the White House since 2009.

"Voter fraud operative: 45 meetings w/Obama — this merits a serious criminal investigation," Cruz said on Twitter.

Robert Creamer is a co-founder of Democratic political consulting group, and was an adviser to Hillary Clinton's campaign. However, he surfaced in a new undercover video from Project Veritas, in which he appears to be supporting the idea of voter fraud.

Creamer quickly resigned, and follow-up reports said Creamer spent time in prison for bank fraud.

Reports also said he visited the White House more than 300 times, and that 45 of them were scheduled to be with President Obama.