‘Hopefully, this device will address many of the questions he refused to answer at last week’s hearing,’ Sen. Ron Johnson said.
The president was responding to numerous media reports that supplies were dwindling.
Federal prosecutors will now decide whether to bring charges against the doctor.
The pilot program will begin with certain applicants from the Dominican Republic who had been previously denied on public charge grounds.
After nearly 15 years leading the Ivy League school, Paxson cited the need for new leadership to oversee the next planning phase.
Buying the fraud-detection firm helps Visa beef up its cybersecurity offerings.

The lawsuit claims the federal agency broke earlier promises of cooperation.
The companies retained equipment, data center arrangements, and network links across the U.S. after the FCC denied or revoked their telecom service licenses.
Missouri law does not allow congressional districting to be challenged through a referendum, elections chief Denny Hoskins said.
Senior Israeli officials said that any new strikes must be approved by the nation’s political leaders.
The former Wayne County Health director narrowly defeated a four-term congresswoman in a contentious race to win the nomination.
This usually involves public assistance given indirectly to immigrants through their U.S.-born children, officials said.
Thousands of slaves are forced to work in scam centers, the new film ‘Scam Slave: From Hell to Home’ reveals.

The invocation of the Fifth Amendment was unsupported because questions were aimed at a period of time covered by a pardon, the resolution states.
The latest attack came as Washington and Tehran disputed whether negotiations to end their war were even underway.
Trump said the two oil giants should give some of their profits ‘back to the public’ and ‘cut the retail price.’
Firefighters continued searching for missing people and battling uncontained blazes.
Government officials persuaded the CDC director to back away from saying the shots did not prevent transmission or infection, according to the diary.
Tehran said it is negotiating only with Oman despite Trump’s announcement that U.S.–Iran talks would begin on Monday.