Operating under the assumption that the more interesting races were those in which members were retiring not to run for office - suggesting that they were perhaps anxious about the electoral climate - we figured out how each of those 131 districts voted in the preceding presidential race and how it voted in the ensuing House race.
"Orange County will always be home to Marie and me, and we look forward to being with all our friends at Lunar New Years, Korean American Days, Fourth of Julys and many other community events for years to come". Royce's announcement punctuated an accelerating trend that leaves his party on treacherous footing in its effort to maintain control of Congress.
Issa's retirement is a major blow to House Republicans in a district that analysts had considered a toss-up. The lack of a 17-year incumbent will now make it easier for Democrats to win the district as they seek to win back the House this year.
Issa announced that he will not seek re-election from the 49th Congressional district of California, which he represented for 18 years.
Royce, who lives in Fullerton and has offices in Brea and Rowland Heights, has served in Congress since 1993, previously serving 10 years in the state Senate.
Yet another Republican Congressman announced on Monday that he would not seek reelection.
Whether Issa's seat flips remains to be seen: although Hillary Clinton carried the district in the 2016 presidential elections, Inside Elections on Wednesday called the race for Issa's seat a toss-up.
Following Issa's announcement, the non-partisan Cook Political Report moved the 49th district from a "toss up" to "lean Democratic".
"In this final year of my Foreign Affairs Committee chairmanship, I want to focus fully on the urgent threats facing our nation, including: the brutal, corrupt and risky regimes in Pyongyang and Tehran, Vladimir Putin's continued efforts to weaponize information to fracture western democracies, and growing terrorist threats in Africa and Central Asia", Royce said in a statement.
Issa was narrowly re-elected in 2016 by 1,621 votes - a less than one percent margin - over retired Marine Corps.
Republicans lead Democrats by seven percentage points in the 49th, which has constituents both in San Diego and Orange Counties. The 49th stretches down the west side of San Diego county, ending before La Jolla.
San Clemente is part of Issa's district that, since 2012, stretches from San Juan Capistrano down the coast to Solana Beach. President Trump is a liability for Republican lawmakers in the state, where two-thirds of voters disapprove of his performance, according to a USC Dornsife/Los Angeles Times poll released in November.
The media and voters alike need to be reminded that while the President does indeed hold the steering wheel on USS America, his rudder is very small and the ship is bloated from bow to stern. Over the weekend, GOP leadership presented several options to the president for participation in this year's elections.
Issa had plans to run in the recall election against Davis, but eventually dropped out when actor-turned-politician Arnold Schwarzenegger entered the race.
Republicans are at less risk of losing the Senate, where only a few GOP incumbents are vulnerable and many Democrats are seeking re-election in states Trump won in 2016. He's followed by Democratic candidate Mike Levin who had $530,000 on hand out of the $918,000 he brought in.
Meanwhile a Republican has jumped into the 39th race as former Assemblywoman Young Kim shoots for the 39th District seat and has already garnered an endorsement from the retiring Royce.