Sen. Al FrankenAl FrankenGOP talks of narrowing ‘blue-slip’ rule for judges Chelsea Handler recalls run-in with Ivanka: 'I can’t even with you' Senators introduce lifetime lobbying ban for lawmakers MORE (D-Minn.) may have been elected eight months ago but he's low-man on the Senate totem poll.

Franken, who was sworn into office on Tuesday after a long legal battle, ranks last when it comes to Senate seniority.

A spokesman for Senate Majority Leader Harry ReidHarry ReidThis week: Congress awaits Comey testimony Will Republicans grow a spine and restore democracy? Racial representation: A solution to inequality in the People’s House MORE's (D-Nev.) office confirmed Franken's position.

"Franken's service begins on the date on which he is sworn. So regardless of state size, etc, he cannot jump over members who were sworn on Jan. 6th," Reid spokesman Jim Manley said in an email. "So Mr. Franken is Number 100 and is last in seniority for all members and, of course last, for Democrats too."

That puts Franken behind several senators who were appointed to their positions after November's election. Sens. Roland Burris (D-Ill.) and Ted Kaufman (D-Del.) joined the Senate in mid January after then-Sens. Barack ObamaBarack ObamaRepublicans are preparing extreme immigration measures The Hill's 12:30 Report Gorka: 'Look at all the smiles' in Israel for Trump's visit MORE (D-Ill.) and Joe BidenJoe BidenBiden fuels 2020 speculation Biden calls for unity: 'It’s time for America to get up' The Hill's 12:30 Report MORE (D-Conn.) were elected to the White House. Sens. Michael BennetMichael BennetSenators introduce lifetime lobbying ban for lawmakers Undocumented activist living in church gets stay of removal Overnight Regulation: Senate confirms SEC pick | House GOP passes 'comp time' bill | MORE (D-Colo.) and Kirsten GillibrandKirsten GillibrandGillibrand on Trump: 'We should look into obstruction of justice' Biden fuels 2020 speculation Chelsea Handler recalls run-in with Ivanka: 'I can’t even with you' MORE (D-N.Y.) also took office in late January to replace senators who took Cabinet positions.

Seniority determines where a senator sits on a committee, particularly in terms of committee leadership. It can also affect seemingly smaller matters, such as what desk a senator has in the chamber and the odds of getting a better office when there is a vacancy. Sen. Robert Byrd (D-W.V.) is the chamber's highest-ranking senator and serves as president pro tempore. That position allows him to preside over the Senate and puts him in line for the presidency.

- J. Taylor Rushing