Graham jokes to Pompeo: You're the 'longest-serving member of the cabinet, right?'

Sen. Lindsey GrahamLindsey Olin GrahamMcConnell defends Trump amid backlash: 'He gets picked at every day' McConnell defends Trump amid backlash: 'He gets picked at every day' The Hill's 12:30 Report — Presented by MAPRx — Biden, Sanders to share stage at first DNC debate MORE (R-S.C.) on Tuesday joked with Secretary of State Mike PompeoMichael (Mike) Richard PompeoThe US must do its part in closing the largest outdoor prison in the world Trump rejects Iran's denial about attack on oil tankers, pointing to video Trump rejects Iran's denial about attack on oil tankers, pointing to video MORE, asking him if he was the longest-serving member of President TrumpDonald John TrumpDC board rejects Trump Hotel effort to dismiss complaint seeking removal of liquor license on basis of Trump's 'character' DC board rejects Trump Hotel effort to dismiss complaint seeking removal of liquor license on basis of Trump's 'character' Mexico's immigration chief resigns amid US pressure over migrants MORE's Cabinet after he mentioned he was about to reach his one-year anniversary in the administration. 

"I'm now nine days short of one year of my time as Secretary of State," Pompeo said while appearing before the Senate Appropriations Committee to testify about State, foreign operations and related programs. 

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"The longest-serving member of the cabinet, right?" Graham quipped in response, prompting awkward laughter from people attending the hearing. 

Pompeo could be seen smiling after Graham made the comment before saying, "Reclaiming my time." 

Graham's comment comes amid a week in which multiple senior officials have exited the administration. Trump announced on Sunday that Homeland Security Secretary Kirstjen NielsenKirstjen Michele NielsenTrump admin program sends asylum-seekers to await claims in Mexico, despite fears of violence: report Trump admin program sends asylum-seekers to await claims in Mexico, despite fears of violence: report Juan Williams: Cloud of illegitimacy hangs over Trump MORE, who assumed her role in 2017, would be leaving her post. 

NBC News reported that a recent push from Trump to renew a family separation policy at the southern border led to Nielsen's ouster.

The White House said the following day that Trump was also removing U.S. Secret Service Director Randolph "Tex" Alles from his position. CNN reported that Trump fired Alles, though Alles has contested that report, saying that he learned "weeks ago" that there would be "transitions in leadership" across the Department of Homeland Security.

A number of high-profile administration officials, including former White House chief of staff John KellyJohn Francis KellyMORE, former Attorney General Jeff SessionsJefferson (Jeff) Beauregard SessionsSarah Sanders to leave White House Sarah Sanders to leave White House Barr compares his return to DOJ to D-Day invasion MORE and former Environmental Protection Agency head Scott PruittEdward (Scott) Scott PruittTrump directs agencies to cut advisory boards by 'at least' one-third Trump directs agencies to cut advisory boards by 'at least' one-third Overnight Energy: Former EPA chiefs say Trump has abandoned agency's mission | Trump in Iowa touts ethanol and knocks Biden | Greens sue Trump over drilling safety rollbacks | FDA downplays worries over 'forever chemicals' MORE, have exited their posts in Trump's first two years in office.

Pompeo was confirmed as secretary of State in April 2018, about a month after Trump dismissed his first State Department chief, Rex TillersonRex Wayne TillersonBolton says Russia, China seeking to promote discord in Trump administration Bolton says Russia, China seeking to promote discord in Trump administration Trump's nastiest break-ups: A look at the president's most fiery feuds MORE, from the role.