Less than a week ago, Republicans firmly held the political spotlight coming off a convention where the party rallied around former President Donald Trump. But just as quickly, Democrats have grabbed the current news cycle, with President Joe Biden announcing his decision to end his reelection campaign and choosing to endorse his vice president, Kamala Harris, as the Democratic nominee.

According to Republican political strategist Bill O’Reilly, Biden’s decision has upended the Republican’s line of attack.

“It changes it a lot. I mean, a lot of money went into the pursuing President Biden and framing him in a certain way, and that money is effectively off the table now,” O’Reilly told NY1 “Morning’s On 1.”

Biden made the announcement in a letter posted to social media Sunday afternoon after weeks of questions about his age and ability to lead Democrats to victory against Trump in the general election.

"It has been the greatest honor of my life to serve as your President," Biden wrote in the letter. "And while it has been my intention to seek reelection, I believe it is in the best interest of my party and the country for me to stand down and to focus solely on fulfilling my duties as President for the remainder of my term."

If Democrats do opt for Harris as the party leader, O’Reilly said he’d expect her vice president pick to go on the attack against Trump, allowing her to focus on delivering a positive vision for the future.