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WASHINGTON, DC - MARCH 21:  U.S. Rep. Ryan Costello (R-PA) (2nd L) speaks as (L-R) Sen. Susan Collins (R-ME), Sen. Lamar Alexander (R-TN) and Sen. Mike Rounds (R-SD) listen during a news conference at the Capitol March 21, 2018 in Washington, DC. Senate Republicans held a news conference to discuss their legislative "proposal to lower health insurance premiums in the individual health insurance market."  (Photo by Alex Wong/Getty Images)
WASHINGTON, DC - MARCH 21:  U.S. Rep. Ryan Costello (R-PA) (2nd L) speaks as (L-R) Sen. Susan Collins (R-ME), Sen. Lamar Alexander (R-TN) and Sen. Mike Rounds (R-SD) listen during a news conference at the Capitol March 21, 2018 in Washington, DC. Senate Republicans held a news conference to discuss their legislative "proposal to lower health insurance premiums in the individual health insurance market."  (Photo by Alex Wong/Getty Images)

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Retiring Republican: Capitol Hill is 'toxic'

Rep. Ryan Costello tells CNN's Lauren Fox he'll miss his job as a member of Congress, even though he thinks the political environment is destructive.

Retiring Republican: Capitol Hill is 'toxic'

Rep. Ryan Costello tells CNN's Lauren Fox he'll miss his job as a member of Congress, even though he thinks the political environment is destructive.