Life News: White House counsel knew about IRS targeting pro-life groups and didn't tell President Obama?

The Wall Street Journal reported late Sunday that "White House counsel Kathryn Ruemmler learned about the inspector general’s conclusions during the week of April 22, including that IRS agents had directed unfair scrutiny towards Tea Party groups and others who were seeking tax exemption."  However, President Obama has said that he didn't learn about the IRS actions until the public did on May 10.  How likely is it that President Obama's chief lawyer learned about information that was certain to be a scandal for the administration and didn't tell the President?