i am mohammed jamjoom. an entire era of turkish politics has been defined by president recep tayyip erdogan. his challenger, kemal kilicdaroglu, is his polar opposite, both in personality and politics. as we reach sunday's closely fought run-off, both candidates are turning to nationalist groups to widen their bases. the struggling economy, inflation, and the aftermath of the earthquakes are all pressing issues, but it appears nationalism can be a defining factor in the selection. reporter: with just a few days left before sunday's runoff election, turkish president recep tayyip erdogan appears confident he will win. he has turned to hard-line nationalists like the third-place candidate who did not make it to the next round of voting. >> i invite all voters to now support president erdogan in the runoff election. reporter: the opposition is feeling the pressure and was looking to nationalist groups for support. kemal kilicdaroglu has adopted a more strident tone, embracing an anti-immigrant rhetoric. it cou