Former President Donald Trump, at a Nevada rally, responded to criticisms about his age, asserting he feels "sharper now than 20 years ago." In a strategic move, he suggested presidential candidates, including himself and Joe Biden, should undergo cognitive tests, possibly in response to Republican rival Nikki Haley's challenge.

Trump, 77, targeted both Haley and Biden, aiming to sideline Haley from the Republican nominating race and setting the stage for a potential general election rematch. Despite back-to-back wins in Iowa and New Hampshire, Trump is frustrated with Haley's refusal to withdraw and has initiated efforts to force her out before the upcoming South Carolina vote.

Haley, however, remains undeterred, vowing to continue campaigning. In a countermove, she invited Trump to a debate as the "ultimate mental competency test," but Trump, known for avoiding debates, declined.

During his speech, Trump resorted to a demeaning nickname for Haley and labeled her a "birdbrain," accusing her of leaning towards radical left Democratic views. Trump emphasized the need to conclude the nomination fight, asserting his lead in South Carolina polls and challenging Biden on immigration issues.

Turning attention to Biden, Trump criticized the handling of the U.S.-Mexico border, describing illegal crossings as a "catastrophe" and an "invasion." With immigration gaining prominence as a key election issue, Trump positioned himself against Biden's administration, characterizing the southern border as an "open wound."

As both Trump and Biden engage in verbal sparring, the political landscape intensifies, setting the stage for a contentious election year.