New data back up what many have assumed: Republican members of Congress in California are being weighed down by the unpopularity of President Trump and the Republican-controlled House of Representatives.

Two Berkeley IGS polls found voters in the districts of Steve Knight (R-Palmdale) and Dana Rohrabacher (R-Costa Mesa) are disinclined to re-elect them. By a margin of 56-38 percent, Knight's voters are disinclined to re-elect him, while voters in Rohrabacher's coastal Orange County district by 51-41 percent also say they want someone new.

Both Knight and Rohrabacher represent districts with changing demographics that Hillary Clinton carried in the 2016 presidential election. Both races have been rated toss-ups by nonpartisan analysts like the Cook Report.

"They both appear to be facing headwinds," said UC Berkeley Institute of Governmental Studies pollster Mark DiCamillo.

He adds that voter attitudes in the districts closely follow approval of Donald Trump and the policies he has embraced. Knight's support for the recent GOP tax bill and an effort to repeal Obamacare are also hurting his standing.