Eighteen GOP senators are asking FBI Director Christopher Wray to open an investigation into President Biden’s key Pentagon nominee to find out whether he solicited or disclosed classified information after his tenure with the Obama administration. The senators do not want the nomination of Colin Kahl for undersecretary of defense for policy to advance for a full vote until the FBI has completed an investigation, they wrote in a letter (pdf). Sen. Bill Hagerty (R-Tenn.) is leading the GOP effort to have Kahl investigated, saying the nominee’s answers to the chairman and ranking member of the Senate Committee on Armed Services during a hearing on March 18 raised more concerns instead of providing answers. “We believe an FBI investigation is warranted given Kahl’s evasive written response on March 23, 2021 … regarding Twitter posts by Kahl in which he appeared to publicly disclose classified information and expressly state that he had received …