AP Photo/J. Scott Applewhite, File
In this July 30, 2011, file photo, Rep. Allen West, R-Fla., talks about the standoff between Democrats and Republicans over the debt crisis on Capitol Hill in Washington.
"I can't thank Director [James] Comey enough for coming to this decision," West wrote.
The conservative firebrand said he "always" had "concern" President Barack Obama would "release the hounds" on Clinton in an effort to replace her as the presumptive Democratic nominee with Vice President Joe Biden.
Biden, West contended, would have been far more difficult for Donald Trump to defeat in November.
"That would be a really tough ticket to beat, since Joe Biden's favorables, regardless of gaffes and such, are extremely high," West wrote.
West wrote that Comey had instead opted to leave Clinton in the race as a significantly damaged candidate - a "gift wrapped with a bow" to Republicans.
Comey said at a Tuesday press conference that 110 emails that traversed Clinton's private email server had classified information at the time they were sent or received. He called her behavior "extremely careless" and said it was "possible" that "hostile actors" had gained access to her account.
Nevertheless, the agency director said "no reasonable prosecutor" would bring charges against her and that the bureau would not recommend doing so.
Attorney General Loretta Lynch indicated last week that she would likely accept the FBI's recommendation.
Both Comey and Lynch are set to testify before Congress this month.