Anyone looking for a roadmap showing which of California’s 53 congressional district elections will be tight next year need look no farther than how the state’s House Democrats voted last month:

At stake was a bill that would essentially halt a federal plan to take in tens of thousands of refugees from Syria and Iraq. The same map shows just which Democrats feel seriously threatened a year before they come up for reelection.

Almost all of this state’s Democrats are staunch liberals. The vast majority voted to back President Obama in his self-described humanitarian effort.

This after Republicans, led by new House Speaker Paul Ryan of Wisconsin, put forward a plan to add numerous layers of additional security to the existing process, which already takes two years to vet each incoming refugee.

The GOP presumption is that hiding among the refugees will be a few terrorists planted by the so-called Islamic State in Iraq and Syria, which appears to have overtaken Al Qaeda as the world’s leading manufacturer of jihadi mayhem.

So far, that assumption hasn’t been proven, even though Republicans pushing the bill cited a Paris police find of a Syrian passport after the mid-November suicide bombings and shootings there. The passport indicated one of the Parisian terrorists entered Europe along with Syrian refugees via a Greek island just off the coast of Turkey. Problem was, the passport turned out to be a probable forgery and may have been planted just to discredit real refugees.

It certainly did that among prominent Republicans. Every major GOP presidential candidate called for at least a pause in America’s intake of refugees.

Dems Who Are Wary

House Republicans voted almost unanimously for the bill, which passed on a 289-137 vote. So did 47 Democrats. California Democrats voting that way included Pete Aguilar of Redlands, Ami Bera of Elk Grove, Julia Brownley of Westlake Village, Jim Costa of Fresno, John Garamendi of Walnut Grove, Scott Peters of San Diego, Janice Hahn of San Pedro and Raul Ruiz of Palm Desert.

Besides their votes on this bill, one thing all have in common is that they are staunch liberals, backing a pathway to citizenship for undocumented immigrants, gun control, access to abortions and almost every other stance held by mainstream Democrats. Another thing all these folks have in common is that all are seeking reelection – except Ms. Hahn. She is now running for her father Kenneth’s old seat on the County Board of Supervisors.

This still leaves her sharing one category with the others: She fears the effect a vote to allow steady immigration of Middle Eastern refugees might have on her election chances.

It’s hard to say how most of these politicians felt about their votes. For sure, they knew President Obama will veto the bill if it ever gets through both houses of Congress.

All have reason to feel insecure. Almost all won reelection last year in very tight races, none more so than Mr. Costa, who was shellshocked after the previously unknown Republican farmer Johnny Tachera. Mr, Tachera led him on Election Night, and only lost to him by a 50.7 to 49.3 percent margin after a month of subsequent vote counting. That was the closest shave ever for longtime incumbent Mr. Costa. Things were just about as tight for Mr. Bera, who bested former Republican Congressman Doug Ose by just 50.4-49.6 percent, or 1,460 votes out of about 180,000 cast.

There was also Mr. Peters, who topped former San Diego City Councilman Carl DeMaio by barely 6,000 votes out of 190,000 cast.

The largest victory margin for any of these folks belonged to Mr. Ruiz, who had a 54-46 victory percentage. Still not much breathing room.

Each of these politicos knows he or she  surely will be a target for the GOP next fall. If the Republicans stage a strong presidential campaign, all of them could be voted out.

Which goes to show that election returns shape votes even if no one likes talking about this powerful aspect of realpolitik.

Mr. Elias may be contacted at tdelias@aol.com. His book, “The Burzynski Breakthrough, The Most Promising Cancer Treatment and the Government’s Campaign to Squelch It,” is now available in a soft cover fourth edition. For more Elias columns, see www.californiafocus.net