Throughout the past week, the press, along with voters and government watchdogs, have essentially asked Sen. Marco Rubio, who announced his re-election campaign just last week, five questions about his decision to run, missed votes in the Senate and his thoughts on Donald Trump.

“I’m fully prepared to have the US Senate as the last political job that I ever have,” during an interview with CNN, “and I just want to be the best senator I can possibly be for the people of Florida.”

Here are five things we know about his campaign.

1. He changed his mind about wanting to enter private life.

After losing the Republican presidential primary, the senator from Florida repeatedly suggested he would become a “private citizen” come January, but life doesn’t always go as planned. He made the decision to run for re-election during Father’s Day weekend in West Miami with his family.

“There was one path that was more personally comfortable and probably smarter politically,” he said in his re-election statement. “But after much thought and prayer, together we chose to continue with public service; to continue down the path that provides the opportunity to make a positive difference at this critical and uncertain time for our nation.”

He pointed out he has never claimed to know it all. “When you’re not perfect and you don’t have all the answers, there are times when you’ll change your mind,” he said in an interview with ABC TV’s local affiliate in Miami.

2. The Orlando terror attack caused him to think about “where you can be most useful to your country.”

During an interview with conservative radio host Hugh Hewitt, the former Republican presidential candidate said that the shooting “deeply impacted” him.

“It really gives you pause to think a little bit about your service to your country and where you can be most useful to your country.”

3. Presidential candidates miss votes, he says.

Rubio’s voting record in the Senate has been an issue ever since former Florida Gov. Jeb Bush criticized him for missing votes while being out on the campaign trail. Government records indicate Rubio missed 14.7 percent of roll call votes from January 2011 to June 2016, much higher than the median of 1.6 percent among the lifetime records of senators currently serving. While missing out on votes is common practice among senators who make a run for the presidency, some voters, including those who make up the Sun Sentinel Editorial Board, still question his commitment to serving Floridians for another six years.

“When you run for president, you miss votes,” Rubio said. Currently serving senators who were also presidential candidates this election cycle missed an increased number of votes, too, including Vermont Sen. Bernie Sanders and Texas Sen. Ted Cruz.

“I’m coming back to be a senator,” Rubio said. “I’m coming fully committed to this job with more passion than ever.”

4. He hasn’t closed the door on running for president in 2020.

Rubio hasn’t ruled out running for president in 2020. What he has said is if someone wanted to win the presidency in the next four years, running for re-election wouldn’t the advantageous decision. For now, he’s taking one step at a time, even if there are potential opportunities for him in the future.

“It’s not my plan,” he said during an interview with MSNBC. “If it was, I wouldn’t run for re-election.”

5. Becoming vice president is “not a viable option.”

With many speculating about vice presidential candidates for presumptive Republican presidential nominee Donald Trump, it’s no surprise Rubio comes to mind. While Rubio has said he has more in common with Trump than presumptive Democratic nominee Hillary Clinton, it’s not enough to land him a spot on the ticket. He rejected the scenario in an interview with CBS’ “Face the Nation by saying it’s “not a viable option” for him.

“The differences in policies that me and Donald have had are too big for something like that to work,” he said. “It would be a distraction, quite frankly, to his campaign.”