I know from personal experience that politics is a blood sport. This is especially true during primary season. Campaigns fall short, egos get bruised, and feelings get hurt.

However, now that most of the votes have been cast and a presumed nominee has emerged, the Republican Party faces a very clear choice: put aside any bad blood and unite for the greater good, or put another Clinton in the White House.

After all, general elections aren’t referendums on two individual candidates in a vacuum — they are a choice between two people being evaluated side-by-side. The contrasts between Donald Trump and Hillary Clinton couldn’t be clearer.

Consider Clinton’s resume and the type of president she would be:

On Clinton’s watch at the State Department, the world quite literally burst into flames. Her failure to increase security at the U.S. consulate in Benghazi, Libya, led to the death of four brave Americans — including Ambassador Chris Stevens, at the hands of Islamic extremists. Her callousness led to their families suffering through unimaginable lies.

From the bungled Russian reset, to the rise of ISIS in Syria, to the missed warning signs on Boko Haram in?Africa — there is literally no corner of this globe that’s better off because of Clinton.

She has used her political influence to boost her financial portfolio. Millions of dollars were funneled through her family’s “foundation” as a slush fund for her to lavishly travel around the world in private jets. Foreign governments wrote checks to the Clinton Foundation for millions of dollars while she was secretary of state, in clear and blatant attempts to trade money for influence.

After leaving the State Department, Clinton earned more than $20 million on the paid speaking circuit. She still refuses to release transcripts of the speeches she gave before Wall Street bankers.

Finally, Hillary Clinton is perceived as an exceedingly unethical candidate. In a survey last year, the words most often associated with her were “liar,” “dishonest,” “untrustworthy,” and “criminal.”

She installed a private email server in her basement to avoid government transparency laws, endangering America’s security interests in the process. Her recklessness set off an FBI investigation, and she will soon be interviewed by FBI agents about potential criminal activity. Already some of her aides are sitting down with the FBI to answer important questions.

Look at Clinton’s last few days as a candidate: She experienced another embarrassing primary loss — this time in Indiana — at the hands of socialist Bernie Sanders. She even publicly apologized for her previous promise “to put a lot of coal miners and coal companies out of business” after her comment backfired.

Simply put, she is a severely flawed candidate and would make an even a worse president.

To my fellow Republicans who had hoped for a different outcome in our primary: I know you’re disappointed. Yet millions of voters in our party have spoken and their voices must be heard. Unlike the Democrats and their corrupt system of superdelegates, we put the political power in the people’s hands. To ignore their votes is to discount their opinions — that’s the antithesis of democracy. For those undecided Republicans, I would trust that you would wait for Trump to pick his team before you decide not to vote and hand the election over to Clinton.

It’s time now to unite and defeat Hillary Clinton.

Scott Brown served as the Republican U.S. senator for Massachusetts from 2010-2013 and is a full-time contributor for Fox News. He was the first former or present federal official to endorse Trump.