In a cluster of glowing human stem cells, one cell divides. The cell membrane is shown in purple, while DNA in the dividing nucleus is blue. The white fibers linking the nucleus are spindles, which aid in cell division.
Allen Institute for Cell Science
Rep. Diana DeGette, D-Colo., and Rep. Fred Upton (right), R-Mich., who have spearheaded the 21st Century Cures Act, speak after a 2015 House of Representatives vote in its favor.
Congressional Quarterly/CQ-Roll Call, Inc./Getty Images
Rep. Tom Price has introduced his own alternative to the Affordable Care Act four times. The legislation provides an idea of how he might lead the Department of Health And Human Services.
Andrew Harrer/Bloomberg via Getty Images
Anti-Zika advice applied to a wall in front of a housing project in the Puerta de Tierras section of San Juan, Puerto Rico. This public health message was part of an island-wide effort to stem the spread of Zika.
Angel Valentin/Getty Images
Rep. Tom Price (center) appeared in early 2016 before the House Rules Committee, when he sponsored legislation that would repeal President Obama's signature health care law.
J. Scott Applewhite/AP