Prior to the 2016 presidential election, Jeb Bush, son and brother to two former U.S. presidents, was among the Republican Party (GOP) lawmakers pursuing the GOP’s presidential nomination. Name recognition may have been on his side had another man with TV notoriety not entered into the race.

Donald Trump would go on to secure the primary and ultimately the election, leading to a controversial administration with fervent support from some people and equally intense opposition from others. Even within the GOP, some supporters struggled to cope with Trump’s approach to national politics which can, at times, seem to lack overarching strategy or the usual fit and finish Americans have come to expect from their executive branch.

Trump’s policy decisions and public statements are often the subject of debate, even within his own party. For instance, a dozen Republican senators sided with Democrats last week to overturn the president’s declaration of a national security emergency along the U.S. southern border in order to secure funding for a wall.

The president’s remarks about the late senator and former prisoner of war John McCain also led to some conservatives breaking rank with their party. McCain and Trump publicly didn’t see eye-to-eye on a number of initiatives, prompting the president to attack the senator over his standing as a “war hero.”

“He’s not a war hero,” Trump said during his presidential run. “He was a war hero because he was captured. I like people who weren’t captured.”

The president’s distaste for McCain didn’t simmer after the senator’s death, with another recent tweet targeting the late Arizona Republican from earlier this week once again stirred unrest among Republicans that either favored McCain or that see public attacks on his character after his death as inappropriate.

Traditionally, a sitting president is seen as the defacto head of the political party that saw him elected in the first place. Sitting presidents are expected to run for re-election and, for the most part, don’t even need to worry about the primaries. This may not be the case for Donald Trump. Bush, a former two-time Republican governor for the state of Florida, publicly called for someone within the GOP to challenge Donald Trump for the party’s nomination in the 2020 election.

Could Trump face a Republican challenger in the primaries? Jeb Bush says he should
Republican presidential candidates Donald Trump (L) and Jeb Bush argue during the presidential debates at the Reagan Library on September 16, 2015 in Simi Valley, California. (Photo: Justin Sullivan/Getty Images)

“I think someone should run just because Republicans ought to be given a choice,” Bush said of his former GOP opponent in a recent interview with CNN. “It’s hard to beat a sitting president, but to have a conversation about what it is to be a conservative, I think it’s important.”