President Donald Trump, taking stock of the election results during a White House press conference, downplayed Democrats’ retaking of the House and highlighted GOP gains in the Senate.

Republicans flipped at least three Senate seats last night, with races in Arizona and Florida still too close to call (Republicans are ahead in the votes counted). Republicans lost a seat it held in Nevada. In Mississippi, a Republican and Democrat are headed to a Nov. 27 runoff, where the Republican is favored.

So, as we write this, Republicans have 51 seats in the Senate and are likely to add one more in Mississippi. The number can grow to 54 if the races in Arizona and Florida stay the GOP’s way.

Trump, who campaigned vigorously for a handful of Republican candidates in tight races, sought to highlight the historical significance of his party’s Senate wins.

"This election marks the largest Senate gains for a president's party in a first midterm election since at least President Kennedy's in 1962," Trump said.

Trump’s read of historical election tallies depends on the outcome of the outstanding outcomes in Mississippi, Arizona and Florida.

Net gains scarce

Few presidents’ first midterm elections in modern American political history have yielded Senate gains for the president’s party.

Part of the equation in this particular election was that Democrats’ were disadvantaged by the fact that they were defending more seats than Republicans. That included 10 states Trump won handily in the 2016 presidential election.

It’s also not unprecedented that the House and Senate end up split between two parties following a midterm.

Still, it’s fairly unusual for a president’s party to notch a net gain in the Senate during a president’s first midterm, as the data from 538.com below shows:

YEAR PRESIDENT SENATE NET LOSS/GAIN BY PRESIDENT’S PARTY 2018 Donald Trump (R) +0-3 2010 Barack Obama (D) -6 2002 George W. Bush (R) +2 1994 Bill Clinton (D) -8 1990 George H.W. Bush (R) -1 Featured Fact-check "There are hit squads being trained all over this country” to violently oppose a second term for President Donald Trump. 1982 Ronald Reagan (R) +1 1978 Jimmy Carter (D) -3 1974 Gerald Ford (R) -4 1970 Richard Nixon (R) +1 1966 Lyndon Johnson (D) -3 1962 John F. Kennedy (D) +4 1954 Dwight D. Eisenhower (R) -2 1946 Harry S Truman (D) -11 1934 Franklin D. Roosevelt (D) +9

No matter how things turn out, Trump’s party fared much better in the Senate than Democrats did during President Barack Obama’s first midterm election, which he famously conceded was a "shellacking."

But the outstanding elections will determine if Trump’s claim is ultimately correct.

President George W. Bush saw Republicans net two Senate seats in 2002, while President Richard Nixon and Republicans gained one seat in 1970, according to 538.com.

If the results hold and Republicans win in Mississippi, Florida and Arizona, Trump would be correct that Republicans’ Senate gains in the 2018 midterms (+3) represent the largest first midterm Senate pickup since President John F. Kennedy’s Democratic party gained four seats in 1962.

Those races are not yet called, though. While Republicans are in a better position in all three states, Trump is counting gains that are not yet certain. We rate statements based on what's known at the time they were made. So we this claim rates Half True.