HUNTSVILLE—Rep. Mo Brooks (R-Ala.) on Monday announced his 2022 candidacy for the U.S. Senate seat vacated by the retiring Sen. Richard Shelby (R-Ala.). Brooks made the announcement at Bullet and Barrel, a gun range in Huntsville, Alabama, alongside Stephen Miller, a senior advisor to former President Donald Trump. Brooks is the second Republican to enter the fray for Shelby’s seat. Trump’s former ambassador to Slovenia, Lynda Blanchard (R), announced her run last month. It is unclear who Trump will endorse, although Miller’s appearance suggests that the former president has his eye on Brooks. Blanchard has described herself as part of the MAGA (Make America Great Again) family and held a fundraiser at Trump’s Mar-a-Lago resort in Palm Beach, Florida. Brooks was the earliest proponent of the Trump-backed effort to challenge the 2020 Electoral College votes during the joint session of Congress on Jan. 6. An endorsement by Trump is the …